Capsule, tablet, powder: the forms of a supplement
The same nutrient can come as a capsule, a tablet, a powder, a chewable gummy or a liquid. This choice of form, or dosage form, is not just a matter of taste: it changes the way you take it, the possible dose and sometimes the tolerability.
The capsule
The capsule is a shell that contains a powder or small beads. Its advantage: it masks the taste, is easy to take with a glass of water, and its shell can be of plant or animal origin, a detail to check on the label.
It is well suited to nutrients with an unpleasant taste and allows delayed-release forms, which release their contents more gradually1. Its limitation comes down to space: a capsule can only hold a limited amount of powder, which sometimes means taking several.
The tablet
The tablet is a compressed powder, sometimes coated. It can hold higher doses in a small volume, which explains its presence for bulky minerals such as calcium.
Some tablets are scored, to adjust the dose, or effervescent, to dissolve in water. The possible downside is a bulky tablet, less easy to swallow, and the presence of compression agents; its disintegration in the stomach determines the release of the contents3,4. A chewable or lozenge tablet offers an alternative when swallowing is a problem.
The dosage form chooses the container; the label states the contents. It is the contents that deserve the last word.
The powder
The powder, to be diluted in water or mixed into a food, allows the largest doses and great flexibility: you adjust the amount by the spoonful. It's the classic form for high-volume supplements.
It does, on the other hand, require preparation and copes poorly with strong tastes, hence the frequent addition of flavourings. It suits people who don't like swallowing capsules and those who want to fine-tune their dose.
Gummies, liquids and dissolving forms
The chewable gummies and the liquid forms bank on ease of taking and taste. They suit those who struggle to swallow tablets and capsules. Their trade-off is an often more limited dose and, for the gummies, the presence of sugars or sweeteners to watch for on the label2.
The forms orodispersible tablets, which melt under the tongue, and sprays complete the range. What these forms have in common is that they favour comfort of taking, sometimes at the cost of a more modest dose or additional ingredients.
How to choose your form
The right choice depends on three simple questions. Do you easily swallow a capsule or a tablet? If not, powder, gummy or liquid will be more comfortable. What dose are you aiming for? Large quantities go down better as a powder or a tablet. Regularity does it matter more than anything? Choose the form you'll take effortlessly, every day.
The best form is the one you actually take. An excellent supplement forgotten at the back of a cupboard is of no use: ease of taking is a criterion in its own right.
What the form doesn't tell you
A sophisticated form does not guarantee a good product: a gummy in attractive packaging may be weakly dosed, and an austere powder very well designed2. The dosage form is a criterion of comfort and dose, not a guarantee of quality in itself.
To judge, you always come back to the back of the box: form of the nutrients, content per dose, list of ingredients5. The dosage form chooses the container; the label, for its part, states the contents. It is the latter that deserves the last word.
References
- Disintegration mechanisms of solid oral dosage forms: a review of the state of the art. Pharmaceutical Research, 2017. ncbi.nlm.nih.gov
- Bioequivalence studies of vitamin D gummies and tablets in healthy adults: results of a cross-over study. National Library of Medicine (PMC), 2019. ncbi.nlm.nih.gov
- Dissolution testing of immediate-release solid oral dosage forms: guidance for industry. U.S. Food and Drug Administration. fda.gov
- Evaluation tests for tablets and capsules: a review of solid oral dosage forms. International Journal of Pharmaceutical Sciences. ijpsjournal.com
- Vitamin and Mineral Supplement Fact Sheets. Office of Dietary Supplements, National Institutes of Health, accessed 2026. ods.od.nih.gov