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Five milligrams of a 1.4 kDa peptide and five of a heavier one are not equal numbers of molecules

Published 26 October 2026 · REVIVE LAB UAE Research Desk · 5 min read
Five milligrams of BPC-157 at 1,419 daltons is about 3.5 micromoles. Five milligrams of the thymosin fragment, heavier than BPC-157, is fewer micromoles — the exact figure follows from the fragment mass on the certificate, and for a 17-residue peptide of around 2 kilodaltons it is roughly 2.5. The blend therefore contains more molecules of BPC-157 than of the fragment, by a factor close to the ratio of their masses. By comparison the GLOW pack holds about 123 micromoles of GHK-Cu beside about 7 of BPC-157, and the Retatrutide pack about 4.2 micromoles of one compound.

The arithmetic

Moles equal mass over molar mass. For BPC-157, 5 over 1,419 milligrams per millimole is 0.0035 millimoles. For the fragment, 5 over its molar mass. Net peptide content on the certificate reduces each by its counterion and water share, more for the fragment. The two reductions are unequal, so the molar ratio in peptide terms differs slightly from the ratio in salt terms.

Multiplying by the Avogadro constant gives the molecule counts.

Why the molar ratio is stated

Because the label ratio is by mass and the molecules differ in size, equal mass is not equal count. Any statement about proportion in this blend is a statement about mass unless the molar figures are given. This page gives them so that the composition is understood in both terms.

The page on why 5 + 5 covers the composition as a product decision.

Reading the figure

The 10 mg total is gross mass of the lyophilised salts. The certificate states peptide content per component. Neither is a quantity for use.

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 arithmetic?

Moles equal mass over molar mass. For BPC-157, 5 over 1,419 milligrams per millimole is 0.0035 millimoles. For the fragment, 5 over its molar mass. Net peptide content on the certificate reduces each by its counterion and water share, more for the fragment. The two reductions are unequal, so the molar ratio in peptide terms differs slightly from the ratio in salt terms.

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

→ BPC-157 + TB500 Pack — 5 mg + 5 mg → Why 5 mg + 5 mg → What 40 mg of a 2 kDa peptide is

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