The literature reports growth factor concentrations in two units; converting between them needs the molecular weight

Published 26 October 2026 · REVIVE LAB UAE Research Desk · 5 min read
Mass concentration in nanograms per millilitre converts to molar concentration by dividing by molecular weight: for IGF-1 LR3 at about 9,111 daltons, 1 ng/mL is about 0.11 nM, and 10 ng/mL about 1.1 nM; for native IGF-1 at 7,649 daltons, 1 ng/mL is about 0.13 nM. The two molecules at the same mass concentration are therefore at different molar concentrations, by about 19 per cent. Receptor binding is a molar phenomenon, so comparisons between the two should be made in nanomolar, and a reader converting from a paper in ng/mL needs the right molecular weight.

The arithmetic

Nanograms per millilitre equals micrograms per litre. Dividing micrograms per litre by grams per mole gives micromoles per litre, and multiplying by a thousand gives nanomolar. For 9,111 grams per mole: 1 microgram per litre divided by 9,111 is 0.00011 micromolar, or 0.11 nanomolar. For culture-media literature reporting tens of nanograms per millilitre, the molar figures are low nanomolar.

Physiological free IGF-1 in serum is in the low nanomolar range; total IGF-1 is around ten to forty nanomolar.

Why the distinction matters

A paper comparing LR3 and IGF-1 at equal ng/mL has given the analogue fewer molecules; one comparing at equal nM has given them equal numbers. Potency ratios quoted in the literature differ depending on which was done, and the difference is close to a fifth. Receptor affinities are always molar.

The same applies to any pair of molecules of different size.

What this page is

A reading aid for the literature. It states no concentration for any use of the pack.

IGF-1 LR3 is supplied by REVIVE LAB UAE for laboratory research use only, with identity and purity documented for the batch. It is not for human or veterinary use, and no dosing, administration or protocol guidance is provided.

What it costs

FormatStrengthPriceAvailability
IGF-1 LR3 Pack1 mgAED 650In stock

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Frequently asked

The arithmetic?

Nanograms per millilitre equals micrograms per litre. Dividing micrograms per litre by grams per mole gives micromoles per litre, and multiplying by a thousand gives nanomolar. For 9,111 grams per mole: 1 microgram per litre divided by 9,111 is 0.00011 micromolar, or 0.11 nanomolar. For culture-media literature reporting tens of nanograms per millilitre, the molar figures are low nanomolar.

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.

IGF-1 LR3 Pack — in stock, dispatched from Dubai
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Supplied for laboratory research use only. Not for human or veterinary consumption. REVIVE LAB UAE provides no dosing, administration or protocol guidance.