Label and dose
Serving size is where supplement labels get slippery
The number on the front of the bottle and the number you actually take are connected by arithmetic that the packaging is not eager to help you with.
Front label says 1,000 milligrams. Supplement facts panel says serving size: three capsules. Bottle contains 90 capsules. That is a 30-day supply at a dose you may not have realised you were signing up for, and the price per effective dose is three times what you calculated.
The short version
- The front of a bottle advertises per serving, and a serving is frequently more than one unit.
- Proprietary blends legally hide the amount of each ingredient, which makes dose comparison impossible.
- Compare products on price per trialled dose, not price per bottle or per capsule.
- A dose far below anything used in research is common and rarely flagged.
Read the panel, not the front
Front-of-pack numbers are marketing. The supplement facts panel is the regulated part, and the first line to read is serving size. Two-capsule and three-capsule servings are common, and they change both the daily dose and the real cost per day.
Then check servings per container. A 90-count bottle at three capsules per serving is a month, not three. This is legal, disclosed, and consistently missed.
Proprietary blends
A proprietary blend lists ingredients in descending order with a single combined weight. You learn that a blend contains 800 milligrams of six things and nothing about how that 800 is divided. It could be 790 of the cheapest and two milligrams each of the rest.
There are legitimate trade-secret reasons for this, and there is also a reason it is so popular in categories where the effective doses are expensive. If a blend hides the amount of the ingredient you are buying the product for, you cannot evaluate the product.
Do the comparison properly
Find the dose used in the human trials you are relying on. Work out how many units of a given product deliver that dose per day. Multiply by price per unit. That is the number to compare across brands, and it frequently reorders the shelf completely.
Products that look cheap often turn out to be underdosed to the point of being irrelevant. Products that look expensive sometimes turn out to be the only ones delivering a dose anyone has studied.
Common questions
Is a low dose always useless?
Not always, but if the dose is far below what was trialled, the trial is not evidence for that product. The claim and the dose have to match.
Why do brands use large serving sizes?
Sometimes because the ingredient is bulky and genuinely will not fit in one capsule. Sometimes because a bigger front-label number sells better.
Sources
- 2026 supplement trends: high-growth categories — https://vitaquest.com/supplement-trends-2026/