Rayshine Peptide Biochemicals reviews
Rayshine Peptide Biochemicals reviews: 18 independent lab tests across 3 products, with a mixed lab record.
Written by the Peptide Vendor Reviews editorial team
Is Rayshine Peptide Biochemicals legit? Lab record: Mixed
How we rate- 18 independent tests
- 12 of 16 lots filled to label
- Median purity 99.9%
- 2 of 3 products graded D or E
Some of Rayshine Peptide Biochemicals's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested Retatrutide
Rayshine Peptide Biochemicals graded E. Paradigm Peptide's Retatrutide graded A across 8 tests, $10.00 / mg.
Buy from Paradigm PeptideAll better-tested optionsPeptide Vendor Reviews independently tests products and verifies reviews. Public methodology, no pay-to-rank.
Better-tested options
Where Rayshine Peptide Biochemicals graded D or E, these shops' samples of the same peptide graded A or B. Ordered by grade, then price per mg. Partner status never changes the order.
Retatrutide
Rayshine Peptide Biochemicals: grade EGHK-Cu
Rayshine Peptide Biochemicals: grade DRayshine Peptide Biochemicals products we've tested
Best-graded first. Grades come from the share of each product's samples that passed purity and quantity checks. Buy links open Rayshine Peptide Biochemicals' site.
- TirzepatideAGREAT
- Tests
- 4
- Passed
- 100.0%
- GHK-CuDPOOR
- Tests
- 3
- Passed
- 66.7%
- RetatrutideEBAD
- Tests
- 11
- Passed
- 54.5%
What the testing shows
Across 16 measured samples from Rayshine Peptide Biochemicals, 4 came in more than 5% under the quantity on the label (25%). Another 4 measured more than 5% over. Purity across 17 readings ran from 94% to 99.95%, median 99.9%. Samples span Aug 2025 to Sep 2026.
- Under label
- 4/16
- Median purity
- 99.9%
- Latest sample
- Sep 2026
- Ships from
- China
more than 5% short
94%–99.95% range
first tested Aug 2025
per vendor listing
Our read on Rayshine Peptide Biochemicals
12 of Rayshine Peptide Biochemicals' 18 graded samples passed (67%), and 100% of all samples were sent in by buyers rather than by the shop.
Results are slipping: 43% passed over the latest six months, down from 82% before.
When a sample failed, the most common reason was purity under 99.5% (3 times).
1 sample failed identity, meaning the lab could not confirm the vial held the labelled peptide.
Against the 302 shops with at least five graded tests, Rayshine Peptide Biochemicals' pass rate is at or above 37% of them, and it has more tests on record than 45% of them.
When and how Rayshine Peptide Biochemicals was tested
Samples per month. The darker part of each bar failed.
- Labs used
- Krause Analytical (14), BTLabs (3), Chromate (1)
- Who sent the samples
- buyers 100%
- Batches covered
- 12 distinct batch numbers; 2 checked for endotoxins
Why Rayshine Peptide Biochemicals' failed samples failed
The 6 most recent failed tests, with the lab's reason.
Retatrutide · Sep 15, 2026
purity under 99.5%
Retatrutide · Sep 7, 2026
the lab could not confirm it was the labelled peptide
Retatrutide · Aug 4, 2026
purity under 99.5%
GHK-Cu · Jun 26, 2026
amount in the vial more than 35% off the label
Retatrutide · Jan 19, 2026
amount in the vial more than 35% off the label
Retatrutide · Aug 12, 2025
purity under 99.5%
Lab testing results
Independent results across 3 products.
Individual lab tests
Date
9/19/2026
Purity
99.7%
Quantity
50 mg → 51.6 mg
Lab
BTLabs
Vial
No label / Silver crimp / Blue cap
Date
9/17/2026
Purity
99.9%
Quantity
20 mg → 17.8 mg
Lab
Krause Analytical
Vial
No label / Gold crimp / Clear cap
Date
9/15/2026
Purity
98.1%
Quantity
10 mg → 11 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / White cap
Date
9/15/2026
Purity
99.9%
Quantity
100 mg → 84.6 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / Red cap
Date
9/7/2026
Purity
—
Quantity
—
Lab
BTLabs
Vial
No label / Silver crimp / Black cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| GHK-CuNo label / Silver crimp / Blue cap | 9/19/2026 | 10.0 | 99.7% | 50 mg → 51.6 mg | BTLabs | View |
| RetatrutideNo label / Gold crimp / Clear cap | 9/17/2026 | 10.0 | 99.9% | 20 mg → 17.8 mg | Krause Analytical | View |
| RetatrutideNo label / Silver crimp / White cap | 9/15/2026 | 9.8 | 98.1% | 10 mg → 11 mg | Krause Analytical | View |
| GHK-CuNo label / Silver crimp / Red cap | 9/15/2026 | 10.0 | 99.9% | 100 mg → 84.6 mg | Krause Analytical | View |
| RetatrutideNo label / Silver crimp / Black cap | 9/7/2026 | — | — | BTLabs | View |
Which Rayshine Peptide Biochemicals products tested best
Tirzepatide has the strongest record, graded A or B.
GHK-Cu and Retatrutide graded D or E: a large share of their samples missed purity or quantity thresholds.
Buying from Rayshine Peptide Biochemicals
If you order from Rayshine Peptide Biochemicals, the A- and B-graded products are the safer picks on this record. For the weaker ones, the better-tested options on this page come from other shops.
We don't track Rayshine Peptide Biochemicals' prices yet. Shipping, payment and refund terms are on their site.
The official store is www.rayshine-peptide.com. Check the address before you pay.
What to check before you pay
- The lot number on the vial matches the certificate
- The certificate names the lab and the test date
- Fill versus label, not purity alone
- A refund policy in writing
Track Rayshine Peptide Biochemicals
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Rayshine Peptide Biochemicals: common questions
Is Rayshine Peptide Biochemicals legit?
We rate lab records, not businesses. Mixed lab record: 18 independent tests, 12 of 16 lots filled to label, median purity 99.9%, 2 of 3 products graded D or E. Each result links to its original certificate in the table above.
What do Rayshine Peptide Biochemicals reviews say?
We don't hold scored customer reviews for Rayshine Peptide Biochemicals yet. The independent lab results on this page are the evidence we have.
Which Rayshine Peptide Biochemicals peptides tested best?
We have graded 3 Rayshine Peptide Biochemicals products. Tirzepatide graded A or B. GHK-Cu and Retatrutide graded D or E.
Is there a Rayshine Peptide Biochemicals coupon code?
We don't have a verified Rayshine Peptide Biochemicals coupon code. A discount changes the price, not what is in the vial.
Where does Rayshine Peptide Biochemicals ship from?
Public listings place Rayshine Peptide Biochemicals's shipping origin in China. Check the shop's own shipping page before ordering, as origin can change.
Ordering from Rayshine Peptide Biochemicals?
Mixed lab record: 18 independent tests, 12 of 16 lots filled to label, median purity 99.9%, 2 of 3 products graded D or E.