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Recovery

Ac-SDKP

Price and cost-per-mg comparison

Ac-SDKP (N-acetyl-seryl-aspartyl-lysyl-proline) is an endogenous tetrapeptide generated from the N-terminus of thymosin beta-4 by the enzyme prolyl oligopeptidase, with further regulation by angiotensin-converting enzyme (ACE), and is characterized by roles in hematopoietic progenitor regulation and anti-fibrotic signaling in renal, cardiac, and vascular tissue. Ac-SDKP inhibits collagen synthesis and fibroblast proliferation, reduces TGF-beta-1-mediated fibrotic signaling, and promotes anti-inflammatory macrophage polarization in preclinical models, suggesting a role in tissue homeostasis downstream of the thymosin beta-4 pathway. Preclinical studies in rodent models of renal fibrosis and systemic lupus erythematosus — predominantly from the NIH-funded Rhaleb and Carretero laboratory at Henry Ford Health — have demonstrated that exogenous Ac-SDKP reduces collagen deposition and inflammatory infiltrate; no human clinical trials have been completed or indexed in PubMed. Ac-SDKP has no FDA approval and no approved indication in any jurisdiction; it is studied as a research compound with a plausible anti-fibrotic mechanism and consistent preclinical evidence, but extrapolation of rodent findings to human therapeutic outcomes has not been validated by any clinical investigation.

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2 listings · 2 vendors · updated 28 Sept 2026 · how prices are computed · educational only, not medical advice

Lowest cost per mg2 vendors compared
$2.72per mg
PROFORMA PEPTIDES UK · $27.19 for 10 mg vial · listed GBP 19.99
Vendor feed · checked 2 wk ago · in stock · no COA on file
View at vendor ↗

Compare listings

Filter by vial size and quantity — the figures and table follow.

Vial size
Quantity
Lowest cost per mg
$2.72
10 mg vial · PROFORMA PEPTIDES UK
Median cost per mg
$3.86
2 listings
Cheapest listing
$27.19
10 mg vial · PROFORMA PEPTIDES UK
Vendors
2
0 with a COA on file · 1 listing in stock
2 listings
VendorSizePriceCost per mg▲COASourceAvailabilityActions
Other sizessingle vials, one listing each2 listingsmedian $3.86 / mg
UK
TB-4 (Ac-SDKP) 10mg
10 mg vial$27.19listed GBP 19.99$2.72—Vendor feed · 2 wk agoIn stockView ↗
US
GORALATIDE (AC-SDKP) PEPTIDE 20MG VIAL
20 mg vial$99.99$5.00—Vendor feed · 4 wk ago—View ↗

— in COA: no certificate on file for this vendor— in availability: stock not read at the last checkPrices as scraped; foreign prices converted to USD

Price movement

When Ac-SDKP prices moved

0 days in the last 120 on which a feed run read comparable Ac-SDKP prices from 3 or more vendors. Each point is the median $/mg across every comparable listing read that day, sized by how many vendors were read. A log of run days, not a continuous series.

Fewer than two qualifying days in the last 120 · checked 28 Sept 2026
Methodology

How these prices are computed

The short version. The methodology page has the rest.

Source

Prices are read from each vendor's own store feed or product markup (Vendor feed). Every row says which source it came from and when it was read. Prices parsed from page text are not in this index.

$/mg

Listed price ÷ stated milligrams, converted to USD. Packs are priced on total milligrams. Listings sold per kit, per ml, as capsules or sprays, as blends, or without a stated mass are shown but not ranked.

Population

Active online research vendors only. Clinic, pharmacy and telehealth prices are excluded. Medians and the p25–p75 band are computed over comparable listings, one row per vendor product and size.

Independence. Ranking in this index: 0 paid placements.

PeptideBase accepts no payment for inclusion in this index.

PeptideBase takes no affiliate commission on vendor sales.

Ordering is by price, from scraped data.

Educational research tools — not medical advice.

Vendor names, product names and prices are as scraped from each vendor's site on the date shown. A COA count is what the vendor publishes and PeptideBase has on file; PeptideBase does not test products itself. Finnrick grades are a third party's rating, reported as-is. Counts are as of 28 Sept 2026.

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