A person should be careful not to exceed the daily recommended doses of vitamin D as taking too much can be toxic. The upper intake level for people over 19 is 100 mcg (4,000 IU).

Rostami F, Moghaddam-Banaem L, Hantoushzadeh S. Weekly high dose versus daily low dose vitamin D3 in treatment of vitamin D3 deficiency in pregnancy: A randomized controlled clinical trial. J ...

Milk, cheese, butter green leafy vegetables, cabbage, carrot, red and yellow fruits (mangoes, papaya, tomato). Large amounts of Vitamin A are also found in fish liver oils (e.g. cod liver oil). As ...

Avoid taking Vitamin D at night as it can disrupt the sleep hormone. Simultaneously, Vitamin D should be consumed with fatty foods for better absorption.

Long-term use of high dose vitamin D supplements may cause adverse side effects, such as dehydration, nausea, vomiting, cardiovascular problems, and confusion. The Office of Dietary Supplements ...

They found that a daily low dose of vitamin D at 400 to 4000 IU (international units) per day was more effective than a larger dose of 60,000 to 120,000 IU once per month or less.

The information was supported by randomized control trials at scale and concluded, "A daily vitamin D supplementation with 2000 IU (50 µg) may be considered a simple, effective, and safe dosage ...

A high daily dose of vitamin D may reduce your risk of being admitted to hospital. But the results are based on a relatively short study, and the researchers can’t be certain that the ...

From their large clinical trial dataset, researchers found daily doses of supplemental vitamin D did not significantly lower total bone fractures, nonvertebral fractures, or hip fractures.

Daily higher-dose vitamin D supplementation may help stave off diabetes in an at-risk population, researchers reported. In a meta-analysis of three randomized clinical trials, vitamin D reduced ...