However, people who need more vitamin D can safely consume 1,000–4,000 IU (25–100 mcg) daily. Consuming more than this is not advised unless prescribed by a healthcare professional.

Group one received 400 International Units (IU) of vitamin D a day until delivery; group two received 2,000 IU and group three received 4,000 IU. The women were evaluated monthly to ensure safety.

Most adults up to age 70 need no more than about 600 IU of vitamin D a day; older people, 800 IU. Avoid exceeding 4,000 IU daily unless your doctor has prescribed a higher dose to treat a deficiency.

One of the groups (109 participants) received 400 IU of vitamin D per day, another (100 participants) received 4,000 IU per day, and the third group (102 participants) received 10,000 IU of ...

Experts recommend that once people hit 70 years old, they should ramp up their vitamin D intake to 800 IU daily. Three ounces of sockeye salmon (570 IU) plus a cup of fortified milk (~100 to 150 ...

Yet, based on the evidence outlined in this review, the authors argue in favor of a daily vitamin D supplement dose of 2000 IU (50 µg) to raise and maintain serum 25 (OH)D concentrations >50 nmol ...

The team followed a group of 132 infants in Montreal who were randomly assigned to receive different daily doses of vitamin D (400 IU per day, 800 IU, 1200 IU and 1600 IU) over a period of 12 months.

Persona uses vitamin D3 sourced from Vitashine. This is a plant-based form of vitamin D. Each tablet contains 25 mcg (1,000 IU) of vitamin D3. The product is free from major allergens, including ...

The two groups say that 600 international units (IU) are generally enough for most healthy adults and that higher doses of vitamin D don’t necessarily produce more health benefits.