Jarrow Formulas N-A-G

Name: Jarrow Formulas N-A-G
Brand: Jarrow Formulas
SKU: 790011190028
Price: 26.19 GBP
Availability: InStock

Brands: Jarrow Formulas

£26.19

Jarrow Formulas N-A-G — 700mg per vcap, 120 vcaps a bottle.

What it is

N-acetyl-D-glucosamine, a form of glucosamine
Check the label for the source and the full ingredient list

How to use

Take as directed on the pack. Joint formulas are normally taken daily over a longer run rather than as a one-off.

Good to know

Format: vcaps
Caffeine free
Vegetarian-friendly capsule shell

A food supplement, not a substitute for a varied diet and healthy lifestyle. Do not exceed the stated dose. Keep out of reach of children.

Quantity

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Categories : Amino Acids & Recovery Supplements, Caffeine-Free Supplements, Everyday Health Supplements, Jarrow Formulas, Joint Supplements, Joint Supplements, Muscle & Joint Supplements, Vegetarian Supplements, Vitamins & Supplements, Workout Recovery Supplements

SKU: 790011190028

At a glance

£0.43

per daily dose

Limited

evidence for glucosamine

Our honest take

N-acetyl glucosamine (NAG), 700 mg per vegetarian capsule, taken once or twice a day. NAG is a different form from the glucosamine sulphate used in the main joint trials, and there is very little human research on it for joints; it is also sold for gut and skin uses with similarly thin evidence. It has no authorised health claim, so we would not pick it over a standard glucosamine.

You have specifically been advised to try N-acetyl glucosamine
You want the form of glucosamine used in most trials: Doctor's Best Glucosamine is cheaper too
You are under 18, pregnant or breastfeeding, or take blood thinners or other medication, without checking with your doctor
You have a shellfish allergy and the source is unclear to you: check with the maker

The science

Glucosamine· evidence: Limited

Glucosamine is a building block of cartilage. In supplements it comes as glucosamine sulphate or glucosamine hydrochloride, usually made from crab and shrimp shells, or from fermented corn in vegan versions. N-acetyl glucosamine is a related form with even less research behind it.

It has been studied a lot, and the results are disappointing. Large independent trials, such as the US GAIT trial, and a big review of the research found little or no difference from a dummy pill for most people. Some earlier trials using one branded glucosamine sulphate looked better, but many of those were funded by the maker. NICE does not recommend glucosamine on the NHS, and EFSA rejected a claim that it helps keep joints healthy.

There is no authorised health claim for glucosamine, so we make no claims about what it does. If you want to try it, the dose used in studies is 1,500 mg of glucosamine sulphate a day, and it is fair to stop after about three months if you notice no difference.

Typical dose: Studies used 1,500 mg of glucosamine sulphate a day

Safety: Most glucosamine is made from shellfish: avoid unless the label says it is from a non-shellfish source if you have a shellfish allergy. Glucosamine may strengthen the effect of warfarin, so speak to your GP or pharmacist first if you take warfarin or another blood thinner. Speak to your GP first if you have diabetes, asthma or glaucoma, or are pregnant or breastfeeding. Can cause mild stomach upset.

Research we looked at:
Clegg DO et al. (2006). Glucosamine, chondroitin sulfate, and the two in combination for painful knee osteoarthritis. N Engl J Med 354:795–808.
Wandel S et al. (2010). Effects of glucosamine, chondroitin, or placebo in patients with osteoarthritis of hip or knee: network meta-analysis. BMJ 341:c4675.
NICE (2022). Osteoarthritis in over 16s: diagnosis and management. NICE guideline NG226.
EFSA NDA Panel (2009). Scientific opinion on the substantiation of health claims related to glucosamine alone or in combination with chondroitin sulphate and maintenance of joints. EFSA Journal 7(9):1264.

Ingredients & nutrition

Ingredients: N-acetyl-D-glucosamine, capsule (hydroxypropyl methylcellulose, water), microcrystalline cellulose, magnesium stearate (vegetable source), silicon dioxide.

Per capsule: N-acetyl glucosamine 700 mg. Daily dose 1–2 capsules (up to 1,400 mg).

Pack: 120 capsules, 60 daily doses at 2 a day.

Allergens: the US retailer listing we found states no fish or shellfish ingredients, but does not name the source; check the label if you have a shellfish allergy. Vegetarian capsule.

Always check the pack you receive, as manufacturers sometimes update recipes.

How to use

Adults: take 1 capsule once or twice a day. Do not exceed the stated daily dose.

Joint products are not a treatment for any condition. If you have ongoing joint pain, stiffness or swelling, see your GP or a physiotherapist.

Price per dose & how it compares

Product	Size	Price	Per daily dose
This product	700mg - 120 vcaps	£26.19	£0.43
Doctor's Best Glucosamine		from £17.99	£0.20
NOW Foods Glucosamine 1000		from £22.99	£0.26
Doctor's Best Vegan Glucosamine with GreenGrown		from £20.99	£0.23

Cost per daily dose lets you compare packs of different sizes fairly.Worked out from our current prices.

Food supplements should not replace a varied, balanced diet and healthy lifestyle. General information, not medical advice. Speak to your GP or pharmacist first if you are pregnant or breastfeeding, have a medical condition or take medication.