Somatropin 191AA: why the chain length is on the label

Published 24 October 2026 · REVIVE LAB UAE Research Desk · 5 min read
Human growth hormone is a single polypeptide of 191 amino acids. "191AA" on a label states that the material is the full-length sequence rather than a fragment or a variant, which is a meaningful distinction in a market that also sells fragments.

The number is the molecule

The principal form of human growth hormone secreted by the pituitary is a 191-residue chain of about 22 kDa. Recombinant somatropin reproduces that sequence.

Stating the residue count is a way of saying the material is the whole chain. It is a specification, not a marketing flourish.

What it is distinguishing itself from

Growth hormone fragments are sold as separate research materials, and a fragment is a different molecule with its own literature. Evidence generated on the full chain does not transfer to a fragment of it, and the reverse is equally true.

A catalogue that states chain length is letting a buyer tell those apart, which matters when a study is being planned against published work.

A protein, with the handling that implies

At 22 kDa this is a folded protein rather than a short synthetic peptide. Its activity depends on structure, so it is more sensitive to heat, to shear and to interfaces than a 15-residue peptide would be.

Handling and storage follow from that: refrigerated, protected from light, dissolved gently rather than shaken.

What is supplied

Somatropin 191AA, 24 mg, boxed with a 3 mL bacteriostatic water vial, with identity confirmed by mass spectrometry and purity by HPLC for the batch.

Research use only. No dosing, administration or protocol guidance is provided.

What it costs

FormatStrengthPriceAvailability
HGH Somatropin Pack24 mg (72 IU)AED 850In 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 number is the molecule?

The principal form of human growth hormone secreted by the pituitary is a 191-residue chain of about 22 kDa. Recombinant somatropin reproduces that sequence.

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.

HGH Somatropin 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.