How To Read A Supplement Label

Published 2026-11-07

Serving size comes first

Every figure on a supplement panel is per serving, and the company decides what a serving is. Two products can print the same milligram number while one means a single capsule and the other means three. Read the serving, then the count per bottle, and only then the numbers.

Look for the word proprietary

A proprietary blend hands you two facts: one combined weight, and the order the ingredients are listed in, which by law runs heaviest first. Nothing else is published.

Do the arithmetic, because it gives you the scale. Five hundred milligrams shared between fourteen ingredients averages about 36 mg each. The split is not even — the ordering proves that — but set 36 mg against the research: berberine trials run at 900 to 1,500 mg daily, cinnamon studies work in grams, alpha-lipoic acid studies begin near 300 mg.

Two conclusions follow. Botanicals inside a blend sit well below trial doses. Micronutrients such as chromium and biotin, needed in micrograms, can easily be supplied at useful amounts. The GlycoAid panel is a straightforward example of both.

Whole herb, extract, standardised extract

Three different materials can carry the same plant name. Whole herb is dried ground plant: cheap, and variable batch to batch. An extract is concentrated, often labeled with a ratio such as 10:1. A standardised extract is adjusted so a named compound sits at a guaranteed percentage, and it is the only one of the three that two brands can be compared on. Nearly every clinical trial uses the third kind.

The other ingredients line

The capsule shell decides the vegetarian claim. A bulking agent such as rice flour is there because capsules come in fixed sizes and a formula has to fill one. A flow agent like magnesium stearate, used at a fraction of a per cent, keeps fill weights consistent on the line. None of the three is worth losing sleep over. Colors and sweeteners in something you swallow whole are worth a second look.

Badges

They are backed by wildly different things. GMP is audited and describes the facility, not the formula. Gluten free has an FDA definition and a threshold. Natural has no regulated meaning at all, and neither does doctor formulated. A row of university or journal logos beneath a product headline reads as endorsement whatever the caption underneath says.