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Antioxidants

Guides and comparisons How to read a supplement label in the EU

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Astaxanthin, lycopene, quercetin, resveratrol, glutathione and NAC supplements, mostly capsules and softgels, plus a few tablets and powders. Capsule and softgel packs hold 30 to 240 units, and the powders weigh 150 g to 500 g. Strengths run from 4 mg to 12 mg for astaxanthin and from 10 mg to 40 mg for lycopene, while quercetin and resveratrol are sold in the hundreds of milligrams. Compare the milligrams of the named ingredient together with the number of capsules in the daily serving, and check whether a figure describes an extract or the compound itself.

Frequently asked questions

How do I compare quercetin and resveratrol strengths?

Start with the nutrition table, because a strength in a title can refer to one capsule or to a daily serving of several. Resveratrol is listed from 100 mg to 637 mg and quercetin from 250 mg to 500 mg. Combination products such as quercetin with bromelain or with vitamin C give each ingredient its own line, and vitamin C also shows a percentage of the 80 mg nutrient reference value (NRV).

What is the difference between a softgel and a vegetable capsule?

A softgel is a soft, sealed capsule that usually holds the ingredient in an oil, which the ingredient list names; most astaxanthin and lycopene products are softgels. A vegetable capsule (vcap) is a two-piece shell made from plant material. Titles marked veggie or vegan name a plant-based shell.

What is NAC, and how is it labelled?

NAC stands for N-acetylcysteine, which is how many ingredient lists name it. It is sold as capsules, tablets and powder, alone or in combinations with glutathione, silymarin, selenium or molybdenum, each on its own line. Selenium and molybdenum are also shown as a percentage of their nutrient reference values, 55 µg and 50 µg.