PepsTracker › Vendors › Labsourced vs S1 Labs
Updated July 2026 · 10 shared compounds · discount codes applied
S1 Labs is cheaper on 6 of the 10 shared peptides, Labsourced on 4 — that is 60% of the 10 compounds where the two actually differ.
Averaged across every shared compound, S1 Labs runs about 24% lower on cost per milligram. Both figures already include each vendor's discount code.
Glowlab (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 | Labsourced | S1 Labs | Cheaper |
|---|---|---|---|
| NAD+ | $0.100/mg $50.15 / 500mg | $0.117/mg $58.49 / 500mg | Labsourced 14% cheaper |
| GHK-Cu | $0.587/mg $58.65 / 100mg | $0.360/mg $36.00 / 100mg | S1 Labs 39% cheaper |
| Bacteriostatic Water | $0.708/mg $21.25 / 30mg | $0.360/mg $3.60 / 10mg | S1 Labs 49% cheaper |
| MOTS-c | $2.32/mg $92.65 / 40mg | $3.42/mg $34.20 / 10mg | Labsourced 32% cheaper |
| Retatrutide | $3.39/mg $203.15 / 60mg | $6.30/mg $62.99 / 10mg | Labsourced 46% cheaper |
| Semax | $4.17/mg $41.65 / 10mg | $3.60/mg $35.99 / 10mg | S1 Labs 14% cheaper |
| Tesamorelin | $6.80/mg $135.99 / 20mg | $3.78/mg $37.80 / 10mg | S1 Labs 44% cheaper |
| BPC-157 + TB-500 Blend | $5.48/mg $109.65 / 20mg | $6.30/mg $62.99 / 10mg | Labsourced 13% cheaper |
| Cagrilintide | $7.56/mg $75.65 / 10mg | $7.20/mg $72.00 / 10mg | S1 Labs 5% cheaper |
| IGF-1 LR3 | $92.65/mg $92.65 / 1mg | $62.99/mg $62.99 / 1mg | S1 Labs 32% cheaper |
Neither vendor wins across the board, which is the main takeaway. Labsourced is cheaper on 4 of the 10 shared compounds and S1 Labs 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: Labsourced lists around 42 compounds we track versus 18 at S1 Labs. Outside the 10 overlap, only one of them will stock what you need.
Labsourced — code Glowlab 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.
S1 Labs is cheaper on 6 of the 10 peptides both vendors stock, Labsourced on 4. Across the compounds where they differ, that is 60% in S1 Labs's favour. On average cost-per-milligram, S1 Labs comes out roughly 24% lower. Neither wins everything, so check the specific compound you need.
Labsourced uses code Glowlab 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. Labsourced lists roughly 42 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.
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.