PepsTracker › Vendors › Solas Science vs Hydro Research
Updated July 2026 · 10 shared compounds · discount codes applied
Hydro Research is cheaper on 6 of the 10 shared peptides, Solas Science on 4 — that is 60% of the 10 compounds where the two actually differ.
Averaged across every shared compound, Solas Science runs about 13% 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 | $0.420/mg $42.00 / 100mg | $0.383/mg $38.25 / 100mg | Hydro Research 9% cheaper |
| Klow Blend | $1.06/mg $85.00 / 80mg | $1.59/mg $127.50 / 80mg | Solas Science 33% cheaper |
| Tirzepatide | $1.08/mg $65.00 / 60mg | $3.68/mg $221.00 / 60mg | Solas Science 71% cheaper |
| Retatrutide | $2.00/mg $60.00 / 30mg | $7.44/mg $297.50 / 40mg | Solas Science 73% cheaper |
| Melanotan II | $4.20/mg $42.00 / 10mg | $2.46/mg $24.65 / 10mg | Hydro Research 41% cheaper |
| Semax | $3.80/mg $38.00 / 10mg | $2.98/mg $29.75 / 10mg | Hydro Research 22% cheaper |
| Selank | $3.80/mg $38.00 / 10mg | $5.95/mg $29.75 / 5mg | Solas Science 36% cheaper |
| Tesamorelin | $7.00/mg $70.00 / 10mg | $4.67/mg $46.75 / 10mg | Hydro Research 33% 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 10 shared compounds and Hydro Research on 6. 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 11 compounds we track versus 40 at Hydro Research. Outside the 10 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.
Hydro Research is cheaper on 6 of the 10 peptides both vendors stock, Solas Science on 4. Across the compounds where they differ, that is 60% in Hydro Research's favour. On average cost-per-milligram, Solas Science comes out roughly 13% lower. Neither wins everything, so check the specific compound you need.
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 10 compounds. Solas Science lists roughly 11 tracked compounds and Hydro Research lists about 40. 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.
PepsTracker is a price comparison service. All products referenced are for research use only. We do not sell or distribute any products. Affiliate links may generate a commission.