Supplement tools & calculators

Compare two supplements by what a dose actually costs — per serving, per day, per month. The bigger bottle usually wins on cost per dose, not the sticker price.

Your daily protein target by weight and goal — plus what hitting it actually costs from protein powder, priced from the cheapest per gram we track. No fitness site prices it.

Your creatine dose by body weight — maintenance, optional loading, and what it costs per day from the cheapest creatine monohydrate we track.

Your safe daily caffeine ceiling and the 3–6 mg/kg pre-workout dose, by body weight — counting coffee, tea and pre-workout toward the limit.

Your maintenance calories from age, sex, weight, height and activity (Mifflin-St Jeor), with targets to lose fat, maintain or build.

Your daily protein, carbs and fat targets from weight, activity and goal — built on your TDEE, with protein set by evidence.

A practical daily water target by weight, activity and climate — with the honest caveats the eight-glasses rule leaves out, and when to add electrolytes.

Search 200,000+ verified supplement labels from the NIH Dietary Supplement Label Database — check the form, dose and ingredients on any product.

On Ozempic, Wegovy or Mounjaro? See which nutrients matter most as you eat less — protein, vitamin D, magnesium, electrolytes — each by cost per dose.

Your recommended daily amount (RDA/AI) and safe upper limit for 16 vitamins and minerals by age and sex, from the NIH / National Academies DRIs.

Build a supplement routine and see what it costs per day, with the cheapest option by cost per dose for each nutrient you add.