Named under S2 as a growth factor modulator, and what that classification means

Published 26 October 2026 · REVIVE LAB UAE Research Desk · 5 min read
Class S2 of the WADA prohibited list covers peptide hormones, growth factors, related substances and mimetics. Within it, the growth factors and growth factor modulators section names thymosin beta-4 and its derivatives, giving TB-500 as the example, prohibited at all times. The listing has appeared since the late 2010s, following detection of TB-500 in horse racing and its appearance in human sport. It differs from the S0 listing of BPC-157: S2 is a pharmacological class for substances with defined growth-related activity, S0 is a catch-all for anything not approved anywhere.

The class

S2 includes erythropoietins, growth hormone and its releasing factors, and a list of growth factors — fibroblast, hepatocyte, insulin-like, platelet-derived, vascular endothelial — together with modulators of them. Thymosin beta-4 was added to this list as a substance affecting tissue repair and vascularisation. The inclusion of derivatives and the naming of TB-500 means any fragment or analogue is covered.

Both compounds in this pack are therefore prohibited in sport, under different classes.

The detection history

TB-500 was first a concern in horse racing, where laboratories developed methods to detect it in equine urine and plasma around 2012. Human anti-doping methods followed. Detection relies on mass spectrometry of the peptide or its fragments, and the window depends on the route and the metabolism of the specific molecule.

The racing origin is why the trade name, rather than the protein name, appears on the list.

Why it is here

Because the regulatory status of both components is part of what a reader should know, and because the two are classified differently for a reason worth understanding. This page states the listing; it is not advice.

The BPC-157 + TB500 blend is supplied by REVIVE LAB UAE for laboratory research use only, with identity by mass spectrometry and purity by HPLC for each component of the batch. It is not for human or veterinary use, and no dosing, administration or protocol guidance is provided.

What it costs

FormatStrengthPriceAvailability
BPC-157 + TB500 Pack5 mg + 5 mgAED 510In stock

Delivery is AED 40 flat and free on orders over AED 700. Payment is cash on delivery anywhere in the UAE, or USDT (TRC20) in advance, which takes 5% off the order total.

Frequently asked

The class?

S2 includes erythropoietins, growth hormone and its releasing factors, and a list of growth factors — fibroblast, hepatocyte, insulin-like, platelet-derived, vascular endothelial — together with modulators of them. Thymosin beta-4 was added to this list as a substance affecting tissue repair and vascularisation. The inclusion of derivatives and the naming of TB-500 means any fragment or analogue is covered.

Does REVIVE LAB UAE provide dosing guidance?

No. REVIVE LAB UAE supplies research materials and provides no dosing, administration or protocol guidance of any kind. Every product is sold for laboratory research use only and is not for human or veterinary consumption.

How fast is delivery in the UAE?

Stock is held in Dubai. An order confirmed before 4 PM Dubai time is dispatched the same working day, reaching Dubai and Abu Dhabi the same day and the remaining emirates within 24 hours. Delivery is AED 40 flat and free over AED 700.

BPC-157 + TB500 Pack — in stock, dispatched from Dubai
HPLC-verified, lot certificate on every carton, 24-hour delivery nationwide. Browse the catalogue → All peptides UAE

Related reading

Supplied for laboratory research use only. Not for human or veterinary consumption. REVIVE LAB UAE provides no dosing, administration or protocol guidance.