Vendor review · planetpeptide.com

Planet Peptide reviews

Q: What do Planet Peptide's lab results show?

62 vials tested between Dec 17, 2024 and Mar 20, 2026: Tirzepatide (19), Retatrutide (14), Semaglutide (8), CJC-1295 (4), Ipamorelin (4), Melanotan II (4), Mazdutide (3), PT-141 (3), GHK-Cu (2) and BPC-157 (1). 62 of 62 were the right peptide, purity was measured on 62, and 11 of 62 were within 5% of the labelled dose. 22 failed our basic check (right peptide, at least 99.5% pure, within 35% of the labelled dose).

Q: Who sent Planet Peptide's vials for testing?

bought by the independent tester (49) and sent in anonymously (13). TrustPointe (18), Chromate (14), Krause Analytical (11), BTLabs (5), Freedom Diagnostics (5), MZ Biolabs (5) and Janoshik (4) ran the tests. 49 were bought by the tester like a normal customer.

Q: Does Planet Peptide have a discount code?

We haven't verified a discount code for Planet Peptide. We only list codes we have seen on the shop's site or confirmed at checkout.

Planet Peptide review: our rating is B (85/100), from 62 independently tested vials across 10 peptides; all 62 were the labelled peptide and 40 met our pass mark. Newest test: Mar 20, 2026. Peptide Vendor Reviews publishes each of these 62 results with its certificate.

Grades describe the samples tested; some links earn us a commission, but never change a vendor's grade. How we grade

Compiled from independent lab data · not yet reviewed by our editorsUpdated Mar 20, 2026

Evidence assessment

Grade B

Our rating · 85/100

In the reviewed independent records, all 62 vials were the right peptide, and 19 of 62 were within 10% of the labelled dose. These results describe the tested samples, not all products or future batches.

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See results by product How we grade

Test results

What was actually in the vials?

Good · 81/100

Mostly good results, with some measurements off target.

All 62 vials were the right peptide.
19 of 62 held within 10% of the labelled dose.
Purity 76.152–100% (some low).
22 of 62 failed our basic check: purity under 99.5% (18), dose more than 35% off the label (5).

Planet Peptide lab test results by peptide

Each product gets its own grade from the available lab records under the same published rubric. Alternative vendors are shown alongside with their compound-level grades. A grade describes the tested samples only.

Planet Peptide's product assessmentsHigher-rated vendors

Tirzepatide
Strong assessment
Listed on the shop's site · last tested Mar 6, 2026
$1.66/mg · cheapest: 120 mg vial
$1.66/mg
cheapest: 120 mg vial
B
Vials tested
19
Right peptide
All
Purity
98.252–99.944%
Labelled quantity
7 of 19 within 10%
Visit shop See each vialFurthest off: +48.8% (batch TZ10-040925)
Higher-rated vendor
A
Guangzhou Jeep Biotechnology JEEP
16 Tirzepatide vials tested · last Aug 4, 2026
$0.42/mg · 74% cheaper than Planet Peptide
Estimated price · as of Aug 22, 2026
Visit shop Read review
Retatrutide
Strong assessment
Listed on the shop's site · last tested Mar 20, 2026
$3.13/mg · cheapest: 40 mg vial
$3.13/mg
cheapest: 40 mg vial
B
Vials tested
14
Right peptide
All
Purity
97.613–100%
Labelled quantity
4 of 14 within 10%
Visit shop See each vialFurthest off: +35.9% (batch RT10-040825)
Higher-rated vendor
A
Peptide Partners
32 Retatrutide vials tested · last Oct 14, 2026
$4.79/mg · 53% more than Planet Peptide
Estimated price · as of Sep 6, 2026
Visit shop Read review
Semaglutide
Mixed assessment
Listed on the shop's site · last tested May 6, 2025
$5.00/mg · cheapest: 10 × 10 mg pack
$5.00/mg
cheapest: 10 × 10 mg pack
C
Vials tested
8
Right peptide
All
Purity
99.135–99.967%
Labelled quantity
0 of 8 within 10%
Visit shop See each vialFurthest off: +26.1% (batch 004012025)
Higher-rated vendor
B
Royal Peptides
8 Semaglutide vials tested · last Jul 23, 2026
$2.00/mg · 60% cheaper than Planet Peptide
cheapest: 10 × 30 mg pack
Visit shop Read review
CJC-1295
Weak assessment
last tested Feb 21, 2025
$11.00/mg · Estimated price · as of Feb 21, 2025
$11.00/mg
Estimated price · as of Feb 21, 2025
D
Vials tested
4
Right peptide
All
Purity
76.152–89.94%
Labelled quantity
1 of 4 within 10%
Visit shop See each vialFurthest off: -43.2% (batch CJCD-080224)
Higher-rated vendor
B
Qing Li Peptide
19 CJC-1295 vials tested · last Aug 12, 2026
$1.40/mg · 87% cheaper than Planet Peptide
Estimated price · as of Jul 21, 2026
Visit shop Read review
Ipamorelin
Mixed assessment
Listed on the shop's site · last tested Feb 19, 2025
$6.00/mg · cheapest: 10 mg vial
$6.00/mg
cheapest: 10 mg vial
C
Vials tested
4
Right peptide
All
Purity
99.547–99.77%
Labelled quantity
3 of 4 within 10%
Visit shop See each vialFurthest off: +32.4% (batch DJCD-120224)
Higher-rated vendor
A
Reta-Peptide
16 Ipamorelin vials tested · last Jul 20, 2026
$0.75/mg · 87% cheaper than Planet Peptide
cheapest: 10 × 10 mg pack
Visit shop Read review
Melanotan II
Mixed assessment
last tested Feb 19, 2025
$2.00/mg · Estimated price · as of Feb 19, 2025
$2.00/mg
Estimated price · as of Feb 19, 2025
C
Vials tested
4
Right peptide
All
Purity
99.54–99.853%
Labelled quantity
2 of 4 within 10%
Visit shop See each vialFurthest off: +22.7% (batch mt10-0913424)
Higher-rated vendor
B
HK Peptides
12 Melanotan II vials tested · last Jul 9, 2026
$0.41/mg · 79% cheaper than Planet Peptide
Estimated price · as of Feb 1, 2026
Visit shop Read review
Mazdutide
Mixed assessment
last tested May 6, 2025
$8.00/mg · Estimated price · as of May 6, 2025
$8.00/mg
Estimated price · as of May 6, 2025
C
Vials tested
3
Right peptide
All
Purity
99.692–99.751%
Labelled quantity
1 of 3 within 10%
Visit shop See each vialFurthest off: +10.8% (batch MZ10-080224)
Higher-rated vendor
B
Peptide-S
4 Mazdutide vials tested · last Nov 25, 2025
$1.80/mg · 77% cheaper than Planet Peptide
Estimated price · as of Nov 25, 2025
Visit shop Read review
PT-141
Mixed assessment
last tested May 7, 2025
$3.00/mg · Estimated price · as of May 7, 2025
$3.00/mg
Estimated price · as of May 7, 2025
C
Vials tested
3
Right peptide
All
Purity
99.76–99.774%
Labelled quantity
0 of 3 within 10%
Visit shop See each vialFurthest off: +40.6% (batch PT10-071624)
Higher-rated vendor
B
Qing Li Peptide
7 PT-141 vials tested · last Sep 4, 2026
Visit shop Read review
GHK-Cu
Mixed assessment
Listed on the shop's site · last tested Mar 6, 2026
$0.38/mg · cheapest: 10 × 100 mg pack
$0.38/mg
cheapest: 10 × 100 mg pack
C
Vials tested
2
Right peptide
All
Purity
99.7–99.73%
Labelled quantity
0 of 2 within 10%
Visit shop See each vialFurthest off: +71.97% (batch GK100-121124)
Higher-rated vendor
A
Reta-Peptide
28 GHK-Cu vials tested · last Sep 15, 2026
$0.06/mg · 84% cheaper than Planet Peptide
Estimated price · as of Jul 1, 2026
Visit shop Read review
BPC-157
Weak assessment
Listed on the shop's site · last tested Feb 18, 2026
$3.50/mg · cheapest: 10 × 10 mg pack
$3.50/mg
cheapest: 10 × 10 mg pack
D
Vials tested
1
Right peptide
All
Purity
98.78%
Labelled quantity
1 of 1 within 10%
Visit shop See each vial
Higher-rated vendor
B
HK Peptides
22 BPC-157 vials tested · last Sep 9, 2026
$0.82/mg · 77% cheaper than Planet Peptide
Estimated price · as of Aug 14, 2026
Visit shop Read review
AOD-9604
Never tested
Listed on the shop's site
$9.50/mg · cheapest: 10 × 5 mg pack
$9.50/mg
cheapest: 10 × 5 mg pack
N/A
No lab has tested this shop's AOD-9604, so we can't say what's in the vial.
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No other AOD-9604 vendor met our quality score, sample-count, and recent-testing requirements.
Compare all AOD-9604 vendors
Cagrilintide
Never tested
Listed on the shop's site
$5.50/mg · cheapest: 10 mg vial
$5.50/mg
cheapest: 10 mg vial
N/A
No lab has tested this shop's Cagrilintide, so we can't say what's in the vial.
Visit shop
Graded vendor
B
Wuhan Wansheng Biotechnology
14 Cagrilintide vials tested · last May 6, 2026
$2.20/mg · 60% cheaper than Planet Peptide
Estimated price · as of Mar 3, 2026
Visit shop Read review
DSIP
Never tested
Listed on the shop's site
$10.00/mg · cheapest: 5 mg vial
$10.00/mg
cheapest: 5 mg vial
N/A
No lab has tested this shop's DSIP, so we can't say what's in the vial.
Visit shop
Graded vendor
B
HkRoids
3 DSIP vials tested · last Jul 20, 2026
Visit shop Read review
Epithalon
Never tested
Listed on the shop's site
$4.00/mg · cheapest: 10 mg vial
$4.00/mg
cheapest: 10 mg vial
N/A
No lab has tested this shop's Epithalon, so we can't say what's in the vial.
Visit shop
No other Epithalon vendor met our quality score, sample-count, and recent-testing requirements.
Compare all Epithalon vendors
Glutathione
Never tested
Listed on the shop's site
$0.05/mg · cheapest: 1500 mg vial
$0.05/mg
cheapest: 1500 mg vial
N/A
No lab has tested this shop's Glutathione, so we can't say what's in the vial.
Visit shop
No other Glutathione vendor met our quality score, sample-count, and recent-testing requirements.
Compare all Glutathione vendors
KPV
Never tested
Listed on the shop's site
$7.50/mg · cheapest: 10 mg vial
$7.50/mg
cheapest: 10 mg vial
N/A
No lab has tested this shop's KPV, so we can't say what's in the vial.
Visit shop
Graded vendor
B
Homopeptide
3 KPV vials tested · last Sep 4, 2026
$0.56/mg · 93% cheaper than Planet Peptide
Estimated price · as of Jul 13, 2026
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LL-37
Never tested
Listed on the shop's site
$11.00/mg · cheapest: 5 mg vial
$11.00/mg
cheapest: 5 mg vial
N/A
No lab has tested this shop's LL-37, so we can't say what's in the vial.
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No other LL-37 vendor met our quality score, sample-count, and recent-testing requirements.
Compare all LL-37 vendors
Melanotan I
Never tested
Listed on the shop's site
$5.00/mg · cheapest: 10 mg vial
$5.00/mg
cheapest: 10 mg vial
N/A
No lab has tested this shop's Melanotan I, so we can't say what's in the vial.
Visit shop
No other Melanotan I vendor met our quality score, sample-count, and recent-testing requirements.
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MOTS-c
Never tested
Listed on the shop's site
$3.75/mg · cheapest: 10 × 10 mg pack
$3.75/mg
cheapest: 10 × 10 mg pack
N/A
No lab has tested this shop's MOTS-c, so we can't say what's in the vial.
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Graded vendor
B
Reta-Peptide
9 MOTS-c vials tested · last Oct 12, 2026
$0.65/mg · 83% cheaper than Planet Peptide
cheapest: 10 × 10 mg pack
Visit shop Read review
Pinealon
Never tested
Listed on the shop's site
$3.75/mg · cheapest: 20 mg vial
$3.75/mg
cheapest: 20 mg vial
N/A
No lab has tested this shop's Pinealon, so we can't say what's in the vial.
Visit shop
No other Pinealon vendor met our quality score, sample-count, and recent-testing requirements.
Compare all Pinealon vendors
PNC-27
Never tested
Listed on the shop's site
$5.00/mg · cheapest: 30 mg vial
$5.00/mg
cheapest: 30 mg vial
N/A
No lab has tested this shop's PNC-27, so we can't say what's in the vial.
Visit shop
No other PNC-27 vendor met our quality score, sample-count, and recent-testing requirements.
Compare all PNC-27 vendors
Prostamax
Never tested
Listed on the shop's site
$3.75/mg · cheapest: 20 mg vial
$3.75/mg
cheapest: 20 mg vial
N/A
No lab has tested this shop's Prostamax, so we can't say what's in the vial.
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No other Prostamax vendor met our quality score, sample-count, and recent-testing requirements.
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Selank
Never tested
Listed on the shop's site
$3.25/mg · cheapest: 10 × 10 mg pack
$3.25/mg
cheapest: 10 × 10 mg pack
N/A
No lab has tested this shop's Selank, so we can't say what's in the vial.
Visit shop
No other Selank vendor met our quality score, sample-count, and recent-testing requirements.
Compare all Selank vendors
Semax
Never tested
Listed on the shop's site
$2.70/mg · cheapest: 10 mg vial
$2.70/mg
cheapest: 10 mg vial
N/A
No lab has tested this shop's Semax, so we can't say what's in the vial.
Visit shop
No other Semax vendor met our quality score, sample-count, and recent-testing requirements.
Compare all Semax vendors
SNAP-8
Never tested
Listed on the shop's site
$2.75/mg · cheapest: 10 × 10 mg pack
$2.75/mg
cheapest: 10 × 10 mg pack
N/A
No lab has tested this shop's SNAP-8, so we can't say what's in the vial.
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No other SNAP-8 vendor met our quality score, sample-count, and recent-testing requirements.
Compare all SNAP-8 vendors
TB-500
Never tested
Listed on the shop's site
$5.00/mg · cheapest: 10 × 10 mg pack
$5.00/mg
cheapest: 10 × 10 mg pack
N/A
No lab has tested this shop's TB-500, so we can't say what's in the vial.
Visit shop
Graded vendor
B
Peptide Partners
11 TB-500 vials tested · last Aug 5, 2026
$4.90/mg · about the same price as Planet Peptide
cheapest: 10 × 10 mg pack
Visit shop Read review
Tesamorelin
Never tested
Listed on the shop's site
$4.25/mg · cheapest: 20 mg vial
$4.25/mg
cheapest: 20 mg vial
N/A
No lab has tested this shop's Tesamorelin, so we can't say what's in the vial.
Visit shop
Graded vendor
B
Shanghai ERP peptide Biotechnology
13 Tesamorelin vials tested · last Oct 12, 2026
$1.45/mg · 66% cheaper than Planet Peptide
cheapest: 10 × 20 mg pack
Visit shop Read review
Wolverine Stack
Never tested
Listed on the shop's site
$6.00/mg · cheapest: 10 mg vial
$6.00/mg
cheapest: 10 mg vial
N/A
No lab has tested this shop's Wolverine Stack, so we can't say what's in the vial.
Visit shop
No other Wolverine Stack vendor met our quality score, sample-count, and recent-testing requirements.
Compare all Wolverine Stack vendors

Vendors shown must meet our published grading criteria for that peptide and follow the shared quality ranking. Partner status never changes the order. We earn a commission on purchases through partner links. Shops can't pay for a grade, and inclusion is not an endorsement.

Quick facts

Planet Peptide reviews: key findings

From 62 vials tested by independent labs. These results describe the tested vials, not every vial the shop sells. Tap i for test definitions and thresholds.

What was in the vials

Right peptide?

62 of 62 vials

Every vial was the peptide on the label

Amount matches label?

19 of 62 vials

Within 10% of the labelled amount

Peptide purity

76.152–100%

Purity across 62 tested vials

Failed our quality check

22 of 62 vials

Purity below 99.5%; Amount more than 35% off label

Testing coverage and limitations

Vials tested for contaminants

2 of 62 vials

Checked for bacterial toxins and heavy metals

Vials with a batch number

57 of 62 vials

Tested vials linked to a production run

Bought anonymously?

49 of 62 vials

Confirmed anonymous purchases

Most recent lab test

Mar 2026

8 months ago; getting old

Test results

What the lab found

62 vials tested by 7 labs, Dec 17, 2024 to Mar 20, 2026. Mostly good results, with some measurements off target.

How close each vial was to the dose on its label

0% means exactly the amount on the label. Green band: within 10%, which is good. Dashed lines: 35% over or under, where a vial fails our basic check.

Retatrutide 20 mgMar 20, 2026 · Batch RT20PR5111125-10.5%
GHK-Cu 100 mgMar 6, 2026+13%
Tirzepatide 30 mgMar 6, 2026 · Batch T30RD2226-20%
BPC-157 10 mgFeb 18, 2026+2%Failed
Retatrutide 20 mgFeb 15, 2026+20.5%
Tirzepatide 60 mgFeb 13, 2026 · Batch TZ60GRGR121725-0.83%
Retatrutide 10 mgFeb 10, 2026-6%
Tirzepatide 10 mgJan 15, 2026 · Batch TZ10-Y111425+3%
Tirzepatide 30 mgDec 4, 2025 · Batch T30BLK102825+1.67%
Tirzepatide 10 mgOct 21, 2025+12%
Tirzepatide 30 mgSep 18, 2025 · Batch TZ30-031025-2.33%
Tirzepatide 30 mgJun 27, 2025 · Batch TZ30-122024+10.57%Failed
Retatrutide 10 mgMay 21, 2025 · Batch RT10-040825+14.7%Failed
Retatrutide 10 mgMay 21, 2025 · Batch RT10-040825+12.8%Failed
Tirzepatide 10 mgMay 21, 2025 · Batch TZ10-040925+15.9%Failed
Tirzepatide 10 mgMay 21, 2025 · Batch TZ10-040925+17%Failed
GHK-Cu 100 mgMay 20, 2025 · Batch GK100-121124+71.97%Failed
Retatrutide 10 mgMay 16, 2025 · Batch RT10-040825+19%
Retatrutide 10 mgMay 16, 2025 · Batch RT10-040825+20%
Tirzepatide 10 mgMay 16, 2025 · Batch TZ10-040925-9.1%
Tirzepatide 10 mgMay 16, 2025 · Batch TZ10-040925-14.3%
Retatrutide 10 mgMay 7, 2025 · Batch RT10-040825+10%
Tirzepatide 10 mgMay 7, 2025 · Batch TZ10-040925+15.2%
Tirzepatide 10 mgMay 7, 2025 · Batch TZ10-040925+13.4%
Tirzepatide 10 mgMay 7, 2025 · Batch TZ10-040925+15.8%
Tirzepatide 10 mgMay 7, 2025 · Batch TZ10-040925+12.1%
PT-141 10 mgMay 7, 2025 · Batch PT10-071624+11.8%
PT-141 10 mgMay 7, 2025 · Batch PT10-071624+10.2%
Retatrutide 10 mgMay 6, 2025 · Batch RT10-040825+27.8%Failed
Retatrutide 10 mgMay 6, 2025 · Batch RT10-040825+28.6%Failed
Mazdutide 10 mgMay 6, 2025 · Batch MZ10-080224+10.6%
Mazdutide 10 mgMay 6, 2025 · Batch MZ10-080224+7.4%
Semaglutide 10 mgMay 6, 2025 · Batch 004012025+23%
Semaglutide 10 mgMay 6, 2025 · Batch 004012025+24%
Semaglutide 10 mgMay 6, 2025 · Batch 004012025+25.7%
Semaglutide 10 mgMay 6, 2025 · Batch 004012025+26.1%
Retatrutide 10 mgApr 25, 2025 · Batch RT10-040825+35.9%Failed
Tirzepatide 10 mgApr 25, 2025 · Batch TZ10-040925+48.8%Failed
PT-141 10 mgApr 25, 2025 · Batch PT10-071624+40.6%Failed
Mazdutide 10 mgApr 25, 2025 · Batch MZ10-080224+10.8%
CJC-1295 5 mgFeb 21, 2025 · Batch CJCD-080224-6.4%Failed
CJC-1295 5 mgFeb 21, 2025 · Batch CJCD-080224-43.2%Failed
CJC-1295 5 mgFeb 19, 2025 · Batch CJCD-080224-17.4%Failed
CJC-1295 5 mgFeb 19, 2025 · Batch CJCD-080224-30.8%Failed
Melanotan II 10 mgFeb 19, 2025 · Batch mt10-0913424+22.7%
Melanotan II 10 mgFeb 19, 2025 · Batch mt10-0913424+21.6%
Melanotan II 10 mgFeb 19, 2025 · Batch mt10-0913424+2.5%
Melanotan II 10 mgFeb 19, 2025 · Batch mt10-0913424+6.6%
Ipamorelin 10 mgFeb 19, 2025 · Batch DJCD-120224+32.4%
Ipamorelin 10 mgFeb 19, 2025 · Batch DJCD-120224-0.4%
Semaglutide 10 mgFeb 14, 2025 · Batch SA10-110124+21.2%
Retatrutide 10 mgFeb 13, 2025 · Batch RT10-122824+7.5%Failed
Retatrutide 10 mgFeb 13, 2025 · Batch RT10-122824+15.8%Failed
Tirzepatide 10 mgFeb 13, 2025 · Batch TZ10-121624+3.9%Failed
Tirzepatide 10 mgFeb 13, 2025 · Batch TZ10-121624+6.6%Failed
Semaglutide 10 mgFeb 13, 2025 · Batch SA10-110124+23.5%Failed
Semaglutide 10 mgFeb 13, 2025 · Batch SA10-110124+22.9%Failed
Ipamorelin 10 mgFeb 13, 2025 · Batch DJCD-120224-2.3%
Ipamorelin 10 mgFeb 13, 2025 · Batch DJCD-120224-1.9%
Retatrutide 10 mgDec 17, 2024 · Batch RT10-110124+3.6%
Tirzepatide 10 mgDec 17, 2024 · Batch TZ10-111024+18.1%
Semaglutide 10 mgDec 17, 2024 · Batch SA10-110124+16.8%

What looks good

62/62
Right peptide every time
Every one of the 62 vials tested was the peptide on the label, across 7 different labs.
62 vials
Clean
No bacterial toxin problems
1 vial was checked for bacterial toxins (endotoxins); none tested positive.
1 vial
- Tirzepatide 60 mg · Feb 13, 2026 · Batch TZ60GRGR121725
49/62
Bought by the tester
49 vials were bought by the independent tester, like any customer would.
49 vials

What to watch

76.152%
Low purity
5 vials measured under 98% purity.
5 vials
+72%
Doses off the label
43 of 62 vials were more than 10% off the labelled dose, including GHK-Cu 100 mg (batch GK100-121124) at +71.97% and Tirzepatide 10 mg (batch TZ10-040925) at +48.8%.
43 vials
18
Products never tested
18 products on sale have never been independently tested, including AOD-9604, Cagrilintide, DSIP.

Planet Peptide website

Recorded sample grade: B. Reta-Peptide has sample grade A.

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Strength of evidence

What supports these results?

A lab result only describes the vial that was tested. This grade shows how well the tested vials represent what you would actually receive.

Strong evidence

Just 2 checked for contamination. The evidence meets our A-band thresholds for sample count, recency and sourcing.

What we looked atWhat we foundRating

How many vials were tested62 vials. We like to see 10 or more.Good
Who bought them49 of 62 bought by the tester like a normal customer; 13 of 62 sent in anonymously by buyers.Good
Batch numbers57 of 62 vials.Good
How recentLatest test 235 days before our check.Fair
Lab reports62 of 62 link to the lab report; none confirmed with the lab yet.Good
Checked for contamination2 of 62 vials.Poor
Different labs7 labs.Good

What this review can't tell you (1)

Lab results describe the vials that were tested, not future batches or other products, and say nothing about whether a peptide is safe or suitable for you.

Shop reputation

Planet Peptide store status, shipping and payment

Kept apart from the lab results: a smooth delivery says nothing about what's in a vial, and a clean lab report says nothing about refunds.

Not reviewed yet

We haven't checked this shop's storefront, registration, news or complaint records yet, so this part isn't graded and doesn't count toward the verdict. Know something we should look at? Tell us.

All tests

Every Planet Peptide vial tested

A vial passes if it's the right peptide, at least 99.5% pure and within 35% of the labelled dose. Tap a vial for its batch, sender and lab report.

Comparison

Planet Peptide vs other peptide vendors

Same peptide, same 12 months, same rules for every shop. Check the number of vials before comparing rates.

Retatrutide

Mar 20, 2025 – Mar 20, 2026 · 275 shops tested

Planet Peptide
11 vials · typical error 19%
Passed
55%6/11
Quantity within 10%
18%2/11
19%
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HK Peptides
117 vials · typical error 5.4%
Passed
84%98/116
Quantity within 10%
76%87/115
5.4%
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LiliPeptide
113 vials · typical error 5%
Passed
76%86/113
Quantity within 10%
85%93/109
5%
–
Qing Li Peptide
106 vials · typical error 6%
Passed
77%82/106
Quantity within 10%
72%76/106
6%
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Nexaph
85 vials · typical error 9.6%
Passed
67%57/85
Quantity within 10%
52%44/84
9.6%
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Market average across all 275 shops: 79% passed, 72% within 10% of the label.

The 4 open shops with the most Retatrutide records in the same window, chosen by record count only.

Methodology

How we grade

Three separate scores out of 100, combined into one letter grade. Great reviews can never make up for bad lab results.

Lab results45%

How pure each vial was and how close it came to the labelled dose. Recent tests count more; a wrong peptide scores zero.

Strength of evidence25%

How many vials were tested, whether they were bought anonymously, and whether the reports can be checked.

Shop reputation30%

Starts at 100 and loses points for each problem we can source. Customer reviews never change a lab result.

Grade scale

A90+
B80+
C70+
D60+
F<60

Evidence uses lower cut-offs, because anonymous purchases are rare across the market.

Limits on the overall grade

Never higher than the lab-results grade.
D at most if the shop can't be ordered from, has a critical problem or fails its lab tests.
C at most if the evidence is very weak.
No lab results means no grade.

Full scoring rulesPoints, caps and cut-offs behind each score

Lab results

Each vial scores out of 100: half for purity, half for how close it was to the labelled dose.
A wrong peptide scores zero, and costs the shop 1.5 more points for every 1% of vials affected.
A vial that tests positive for bacterial toxins can score no more than 30.
Recent vials count more than old ones. Reports the shop published itself count 50%.
With only a few vials, we hold back: one perfect vial can't earn an A.

Strength of evidence

How many vials were tested (up to 35 points).
Whether they were bought anonymously, like a customer would (up to 20).
Batch numbers, how recent the tests are, a lab report you can check, contamination tests and more than one lab (the remaining 45).
Cut-offs: A 80+ · B 70+ · C 60+ · D 50+ · F 0+.

Shop reputation

Starts at 100. Each problem we can source costs points: critical 35, major 20, minor 7.
"Not reviewed yet" until we've checked, and then it doesn't count toward the overall grade.
Customer reviews inform this score only; they never change a lab result.

What the lab grade means. A: Vials were the right peptide, very pure and close to the labelled dose. C: Results were mixed: some measurements missed the mark. F: Results often failed: wrong peptide, low purity or far-off doses.

Where the data comes from, and what we didn't doSources, the basic check, missing data, authorship

Lab data. Results come from independent lab records, each published with its lab report. We copy the measurements, link the report, and grade them ourselves; nobody else's rating is used. The data is refreshed at most hourly.

The basic check. A vial passes if it's the right peptide, at least 99.5% pure, and within 35% of the labelled dose. A vial missing purity or dose is marked "not enough data", never a pass.

Missing data and look-alikes. Missing values are shown as "not measured" or "not checked". Shops with similar names aren't combined unless a connection is documented.

What we didn't do. Unless a vial says otherwise, we didn't buy or test it ourselves, didn't confirm reports with the labs, and didn't contact the shop.

Authorship. This page is compiled automatically from lab data and hasn't been reviewed by an editor yet. We have no affiliate relationship with Planet Peptide and earn nothing from it.

Have evidence we should see? Lab reports with a batch number, order records or corrections can be sent through our contact page or to editorial@peptidevendorreviews.org.

The same rubric applies to every shop, and commercial relationships never change ratings, grades, rankings, or the selection of alternatives. Partner links are labelled. A grade describes the evidence on the date shown. It isn't advice to buy or avoid a shop, or a judgement on whether any peptide is safe or right for you. Rubric grading-v2 (2026-10-24).

Elsewhere

Where Planet Peptide is discussed

Customer reviews and forum threads are kept off this page. These links open the conversations people search for.

FAQ

Planet Peptide reviews: common questions

Is Planet Peptide legit?

The reviewed evidence receives grade B under our published rubric. Independent labs have tested 62 of its vials across 10 peptides; 62 were the right peptide and 40 passed our basic check. Failed: BPC-157 10 mg (failed: purity was 98.78%, below 99.5%); Tirzepatide 30 mg (batch TZ30-122024) (failed: purity was 99.281%, below 99.5%); Retatrutide 10 mg (batch RT10-040825) (failed: purity was 99.269%, below 99.5%); Retatrutide 10 mg (batch RT10-040825) (failed: purity was 99.266%, below 99.5%); Tirzepatide 10 mg (batch TZ10-040925) (failed: purity was 99.344%, below 99.5%); Tirzepatide 10 mg (batch TZ10-040925) (failed: purity was 99.116%, below 99.5%); GHK-Cu 100 mg (batch GK100-121124) (failed: the dose was +71.97% from the label, beyond the 35% limit); Retatrutide 10 mg (batch RT10-040825) (failed: purity was 98.988%, below 99.5%); Retatrutide 10 mg (batch RT10-040825) (failed: purity was 99.018%, below 99.5%); Retatrutide 10 mg (batch RT10-040825) (failed: the dose was +35.9% from the label, beyond the 35% limit); Tirzepatide 10 mg (batch TZ10-040925) (failed: the dose was +48.8% from the label, beyond the 35% limit); PT-141 10 mg (batch PT10-071624) (failed: the dose was +40.6% from the label, beyond the 35% limit); CJC-1295 5 mg (batch CJCD-080224) (failed: purity was 89.94%, below 99.5%); CJC-1295 5 mg (batch CJCD-080224) (failed: purity was 84.9%, below 99.5%; the dose was -43.2% from the label, beyond the 35% limit); CJC-1295 5 mg (batch CJCD-080224) (failed: purity was 78.814%, below 99.5%); CJC-1295 5 mg (batch CJCD-080224) (failed: purity was 76.152%, below 99.5%); Retatrutide 10 mg (batch RT10-122824) (failed: purity was 99.069%, below 99.5%); Retatrutide 10 mg (batch RT10-122824) (failed: purity was 97.613%, below 99.5%); Tirzepatide 10 mg (batch TZ10-121624) (failed: purity was 98.258%, below 99.5%); Tirzepatide 10 mg (batch TZ10-121624) (failed: purity was 98.252%, below 99.5%); Semaglutide 10 mg (batch SA10-110124) (failed: purity was 99.18%, below 99.5%); Semaglutide 10 mg (batch SA10-110124) (failed: purity was 99.135%, below 99.5%). We grade lab evidence and published facts; grades are not endorsements and do not determine whether a business acts lawfully.

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What do Planet Peptide's lab results show?

62 vials tested between Dec 17, 2024 and Mar 20, 2026: Tirzepatide (19), Retatrutide (14), Semaglutide (8), CJC-1295 (4), Ipamorelin (4), Melanotan II (4), Mazdutide (3), PT-141 (3), GHK-Cu (2) and BPC-157 (1). 62 of 62 were the right peptide, purity was measured on 62, and 11 of 62 were within 5% of the labelled dose. 22 failed our basic check (right peptide, at least 99.5% pure, within 35% of the labelled dose).

Who sent Planet Peptide's vials for testing?

bought by the independent tester (49) and sent in anonymously (13). TrustPointe (18), Chromate (14), Krause Analytical (11), BTLabs (5), Freedom Diagnostics (5), MZ Biolabs (5) and Janoshik (4) ran the tests. 49 were bought by the tester like a normal customer.

Does Planet Peptide have a discount code?

We haven't verified a discount code for Planet Peptide. We only list codes we have seen on the shop's site or confirmed at checkout.

Planet Peptide website

Recorded sample grade: B. Reta-Peptide has sample grade A.

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Sources

Sources, updates and corrections

Independent lab test records, one linked per vial in the test list · Test data: Finnrick Analytics · read Nov 10, 2026

For this shop

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