There are two types of vitamin D supplements available for over-the-counter purchase (vitamin D2 and vitamin D3). Vitamin D3 is the type that most experts believe should be utilized in clinical ...

Most vitamin D3 supplements available over-the-counter are sold in dosages between 1000–5000 IU, but some are higher. “Ask ...

Vitamin D3 is produced when the skin is exposed to ... People who are deficient may need to take more. Most over-the-counter vitamin D supplements are between 1,000 and 5,000 IU, and some are ...

Vitamin D3 supplementation was associated with antihypertensive effects without significant between-dose differences among overweight older adults.

Vitamin D2 is found in plants, while D3 — which is considered the more ... Vitamin D supplements are available over the counter and are a common way to increase vitamin D intake.

Vitamin D2 aids calcium absorption, strengthens bones, and supports immunity. Found in plants, it's used to treat vitamin D deficiency.