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High-dose Vitamin A and D onset protocol

technique

1 creator use or recommend it

▲ 1 active in the last 90 days

1 recommend
Last discussed Oct 5, 2026

Taking 50,000 IU of vitamin A and 50,000 IU of vitamin D daily for 3-5 days at the first sign of illness.

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How High-dose Vitamin A and D onset protocol compares

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A
Adaptogenic mushrooms Different focus
immune-supporting medicinal mushrooms

Mark uses high-dose vitamins A and D at illness onset; mushrooms are taken alongside them, not instead.

1 creator
Mark Hyman, MD

"Often when people are starting to feel sick, I'll recommend they do a couple of really key things which sound kind of unusual but they really seem to work, which is fifty thousand of vitamin A and fifty thousand of vitamin D for three to..."

Combined with adaptogenic mushrooms and other nutrients

What creators say

Mark Hyman, MD
recommends
Used for: Taken at the first onset of cold symptoms Praised: Seems to work if started early vs: Combined with adaptogenic mushrooms and other nutrients

"Often when people are starting to feel sick, I'll recommend they do a couple of really key things which sound kind of unusual but they really seem to work, which is fifty thousand of vitamin A and fifty thousand of vitamin D for three to five days..."

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