PepsTracker › Vendors › Hydro Research vs S1 Labs
Updated July 2026 · 10 shared compounds · discount codes applied
These two are dead even — each is cheaper on exactly 5 of the 10 shared peptides.
Averaged across every shared compound, S1 Labs runs about 17% lower on cost per milligram. Both figures already include each vendor's discount code.
PepsTracker15 (15% off)pepstracker10 (10% off)Every price below is the discounted price divided by milligrams, so vial sizes do not distort the comparison. Sorted by cheapest available option.
| Peptide | Hydro Research | S1 Labs | Cheaper |
|---|---|---|---|
| NAD+ | $0.076/mg $76.50 / 1000mg | $0.117/mg $58.49 / 500mg | Hydro Research 35% cheaper |
| GHK-Cu | $0.383/mg $38.25 / 100mg | $0.360/mg $36.00 / 100mg | S1 Labs 6% cheaper |
| MOTS-c | $2.98/mg $29.75 / 10mg | $3.42/mg $34.20 / 10mg | Hydro Research 13% cheaper |
| Semax | $2.98/mg $29.75 / 10mg | $3.60/mg $35.99 / 10mg | Hydro Research 17% cheaper |
| SS-31 | $2.98/mg $148.75 / 50mg | $3.42/mg $34.20 / 10mg | Hydro Research 13% cheaper |
| Tesamorelin | $4.67/mg $46.75 / 10mg | $3.78/mg $37.80 / 10mg | S1 Labs 19% cheaper |
| BPC-157 + TB-500 Blend | $5.01/mg $50.15 / 10mg | $6.30/mg $62.99 / 10mg | Hydro Research 20% cheaper |
| Retatrutide | $7.44/mg $297.50 / 40mg | $6.30/mg $62.99 / 10mg | S1 Labs 15% cheaper |
| Cagrilintide | $18.70/mg $93.50 / 5mg | $7.20/mg $72.00 / 10mg | S1 Labs 61% cheaper |
| IGF-1 LR3 | $72.25/mg $72.25 / 1mg | $62.99/mg $62.99 / 1mg | S1 Labs 13% cheaper |
Neither vendor wins across the board, which is the main takeaway. Hydro Research is cheaper on 5 of the 10 shared compounds and S1 Labs on 5. If you buy a single compound, the table above is the answer. If you are placing one larger order to save on shipping, the vendor that wins your two or three highest-volume compounds usually nets out ahead.
Catalog breadth matters too: Hydro Research lists around 40 compounds we track versus 18 at S1 Labs. Outside the 10 overlap, only one of them will stock what you need.
Hydro Research — code PepsTracker15 for 15% off. S1 Labs — code pepstracker10 for 10% off. Codes are applied before ranking on this page, which is why the order can differ from list prices. Always confirm the code at checkout.
They are remarkably even — each wins on the same number of shared compounds. The right pick depends entirely on which specific peptide you are buying.
Hydro Research uses code PepsTracker15 for 15% off, and S1 Labs uses pepstracker10 for 10% off. Every price in the comparison table already has these codes applied, which is why the ranking can differ from list prices.
They overlap on 10 compounds. Hydro Research lists roughly 40 tracked compounds and S1 Labs lists about 18. If you need something outside the overlap, only one of them will have it.
Vial sizes differ between vendors, so sticker price is misleading. A larger vial at a higher price is often cheaper per milligram. Every figure here is the discounted price divided by milligrams, which is the only like-for-like comparison.
Open the live tracker to compare these two against all 25 vendors in real time, or browse every vendor we track.
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