Vitamin D
Vitamin D is the clearest example of why supplement labels need reading twice: the same dose is printed as IU on one bottle and as micrograms on the next. 25 mcg and 1,000 IU are the same amount, and products across this page span roughly 400 IU to 10,000 IU per softgel.
The second variable is the form. D3 (cholecalciferol) is the more common and is usually animal-derived from lanolin, though lichen-derived D3 exists for anyone avoiding that; D2 (ergocalciferol) is plant-derived. Many products combine D3 with vitamin K2, in which case the K2 dose in micrograms appears on the panel alongside it.
Use the strength filter to line up comparable doses, then narrow by brand, format and servings per container. Related: multivitamins, which include vitamin D at lower doses, magnesium, vitamin C, and the full vitamins hub.
Showing 1–12 of 50 results
