Vitamin D2 (Ergocalciferol)｜HerbBB ingredient encyclopedia

Why supplement?

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Helps raise vitamin D status and support calcium absorption and bone health.

Clinical evidence: Established

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Vitamin D helps the gut absorb calcium and maintains bone mineralization.

Clinical evidence: Strong

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Adequate vitamin D helps muscles maintain normal function.

Nutrition consensus: Established

With foodTake with a meal that contains fat for better absorption

Best timeBreakfast or lunch

Follow the product label and professional advice.

General wellness15 mcg/day (600 IU) for adults; 20 mcg/day (800 IU) from age 71

Specific needsDeficiency treatment doses should follow 25(OH)D testing and a doctor's directions.

How oftenUse the recommended daily intake; the usual adult upper limit is 100 mcg (4,000 IU)/day unless a doctor advises otherwise.

Deficiency treatment should be adjusted using 25(OH)D testing, not by raising the dose on your own.

People with kidney disease, parathyroid disease, high blood calcium, or who take calcium-containing medicines should ask a doctor first.

Do not self-treat vitamin D deficiency with high doses; adjust using blood tests.

Common side effects

· Long-term excess may cause nausea, thirst, or constipation

Rare but important

· Toxicity can cause high blood calcium, kidney injury, and heart-rhythm problems.

Long-term dependenceNot addictive; fat-soluble vitamins can accumulate with long-term excess.