PepsTracker › Vendors › Solas Science vs Hydro Research
Updated August 2026 · 8 shared compounds · discount codes applied
These two are dead even — each is cheaper on exactly 4 of the 8 shared peptides.
Averaged across every shared compound, Solas Science runs about 19% lower on cost per milligram. Both figures already include each vendor's discount code.
PepsTracker15 (15% 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 | Solas Science | Hydro Research | Cheaper |
|---|---|---|---|
| NAD+ | $0.080/mg $40.00 / 500mg | $0.076/mg $76.50 / 1000mg | Hydro Research 4% cheaper |
| GHK-Cu | $0.500/mg $50.00 / 100mg | $0.383/mg $38.25 / 100mg | Hydro Research 24% cheaper |
| Klow Blend | $1.06/mg $85.00 / 80mg | $1.59/mg $127.50 / 80mg | Solas Science 33% cheaper |
| Tirzepatide | $1.63/mg $98.00 / 60mg | $3.68/mg $221.00 / 60mg | Solas Science 56% cheaper |
| Melanotan II | $4.20/mg $42.00 / 10mg | $2.46/mg $24.65 / 10mg | Hydro Research 41% cheaper |
| Selank | $3.80/mg $38.00 / 10mg | $5.95/mg $29.75 / 5mg | Solas Science 36% cheaper |
| Retatrutide | $4.00/mg $120.00 / 30mg | $7.44/mg $297.50 / 40mg | Solas Science 46% cheaper |
| CJC/Ipa Blend | $6.30/mg $63.00 / 10mg | $5.10/mg $51.00 / 10mg | Hydro Research 19% cheaper |
Neither vendor wins across the board, which is the main takeaway. Solas Science is cheaper on 4 of the 8 shared compounds and Hydro Research on 4. 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: Solas Science lists around 10 compounds we track versus 38 at Hydro Research. Outside the 8 overlap, only one of them will stock what you need.
Solas Science — code for 0% off. Hydro Research — code PepsTracker15 for 15% 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.
Solas Science uses code for 0% off, and Hydro Research uses PepsTracker15 for 15% 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 8 compounds. Solas Science lists roughly 10 tracked compounds and Hydro Research lists about 38. 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 27 vendors in real time, or browse every vendor we track.
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