Evidence report · Gut, immune system and inflammation
Vitamin C is an essential antioxidant and cofactor, and correcting a shortfall helps. Gut absorption caps what oral doses can do, so mega-dosing by mouth adds little; only IV reaches much higher blood levels. It helps iron absorption, and its effect on colds is modest.
Verdict
Leaning for
Vitamin C supplements are worth taking.
5 sources: 1 positive, 3 partly, 1 neutral
5 sources credited10 counted mentions182 episodes · 134 h10 checked quotesChecked against the tape 2026-03-23
Each claim gets one verdict, worked out from every counted mention. One dot is one source: a researcher or a study. Tap a dot to see its receipt.
positive partly neutral negative Each researcher and each study counts once per claim, however often they come up.
Vitamin C supplements are worth taking.
5 sources: 1 positive, 3 partly, 1 neutral.
Researchers say
1 positive, 3 partly, 1 neutral
Mark Hyman, 4 mentions on this claim
Positive Video
on The Dr. Hyman Show, at 01:30 · positive
“I take vitamin C I take herbs I take Chinese mushrooms like Mitaki shitaki RI these are all great cocktails”
on The Dr. Hyman Show, at 05:19 · positive
“I take vitamin C I take herbs I take Chinese mushrooms like Mitaki shitaki Rishi these are all great cocktails you can use to help”
on The Dr. Hyman Show, at 51:54 · positive
“a little extra zinc a little extra vitamin C omega-3 fats that's sort of a basic stack that most people do”
on The Dr. Hyman Show, at 03:34 · partly
“help support your adrenals vitamins and minerals just a good multivitamin vitamin C zinc uh B complex even with B5”
Dr. Andy Galpin, on FoundMyFitness, at 2:10:06
Partly Video · Opinion
Open the tape at 2:10:06 →“We're not just giving it to people besid like a standard like magnesium or omega-3. We will use it judiciously in different things.”
Alan Aragon, on Huberman Lab, at 2:18:56
Partly Video · Opinion
Open the tape at 2:18:56 →“I take vitamin C. Extra vitamin C, a gram a day.”
David Perlmutter, on The Dr. Hyman Show, at 58:14
Partly Video · Opinion
Open the tape at 58:14 →“vitamin c which aids in excreting uric acid your vitamin c has been the darling supplement for gout patients for decades and that would be again about 500 milligrams per day”
Dr. Richard Johnson, on The Dr. Hyman Show, at 56:07
Neutral Video · Their own research
Open the tape at 56:07 →“then we gave them a higher dose of vitamin c which correlates better with the kinds of blood levels that lean people tend to have”
Studies show
No study counted yet.
Mark Hyman Video · positive · 4 mentions
on The Dr. Hyman Show, at 01:30 · positive · Opinion
“I take vitamin C I take herbs I take Chinese mushrooms like Mitaki shitaki RI these are all great cocktails”
on The Dr. Hyman Show, at 05:19 · positive · Opinion
“I take vitamin C I take herbs I take Chinese mushrooms like Mitaki shitaki Rishi these are all great cocktails you can use to help”
on The Dr. Hyman Show, at 51:54 · positive · Opinion
“a little extra zinc a little extra vitamin C omega-3 fats that's sort of a basic stack that most people do”
on The Dr. Hyman Show, at 03:34 · partly · Opinion
“help support your adrenals vitamins and minerals just a good multivitamin vitamin C zinc uh B complex even with B5”
Dr. Andy Galpin, on FoundMyFitness, at 2:10:06 Video · partly · Opinion
“We're not just giving it to people besid like a standard like magnesium or omega-3. We will use it judiciously in different things.”
Alan Aragon, on Huberman Lab, at 2:18:56 Video · partly · Opinion
“I take vitamin C. Extra vitamin C, a gram a day.”
David Perlmutter, on The Dr. Hyman Show, at 58:14 Video · partly · Opinion
“vitamin c which aids in excreting uric acid your vitamin c has been the darling supplement for gout patients for decades and that would be again about 500 milligrams per day”
Dr. Richard Johnson, on The Dr. Hyman Show, at 56:07 Video · neutral · Their own research
“then we gave them a higher dose of vitamin c which correlates better with the kinds of blood levels that lean people tend to have”
Vitamin C supplements support immune function.
2 sources: 1 positive, 1 partly. Fewer than 3 sources so far.
Researchers say
1 positive, 1 partly
Mark Hyman, 3 mentions on this claim
Positive Video
on The Dr. Hyman Show, at 01:30 · positive
“I take vitamin C I take herbs I take Chinese mushrooms like Mitaki shitaki RI these are all great cocktails you can use to help”
on The Dr. Hyman Show, at 05:19 · positive
“I take vitamin C I take herbs I take Chinese mushrooms like Mitaki shitaki Rishi these are all great cocktails you can use to help”
on The Dr. Hyman Show, at 51:54 · positive
“you might want to take a little extra zinc a little extra vitamin C omega-3 fats”
Dr. Andy Galpin, on FoundMyFitness, at 2:07:18
Partly Video · Opinion
Open the tape at 2:07:18 →“for any kind of immune support that we can have. I I'm not I do not hesitate to go to a gram of vitamin C.”
Studies show
No study counted yet.
Mark Hyman Video · positive · 3 mentions
on The Dr. Hyman Show, at 01:30 · positive · Opinion
“I take vitamin C I take herbs I take Chinese mushrooms like Mitaki shitaki RI these are all great cocktails you can use to help”
on The Dr. Hyman Show, at 05:19 · positive · Opinion
“I take vitamin C I take herbs I take Chinese mushrooms like Mitaki shitaki Rishi these are all great cocktails you can use to help”
on The Dr. Hyman Show, at 51:54 · positive · Opinion
“you might want to take a little extra zinc a little extra vitamin C omega-3 fats”
Dr. Andy Galpin, on FoundMyFitness, at 2:07:18 Video · partly · Opinion
“for any kind of immune support that we can have. I I'm not I do not hesitate to go to a gram of vitamin C.”
5 more claims on dose, form and timing, each with its verdict and receipts, are in the full report.
6 risks to check before you start
Built from every credited researcher and cited study on each claim.
Vitamin C supplements are worth taking.
Mark Hyman, 4 mentions on this claim
Positive Video
on The Dr. Hyman Show, at 01:30 · positive
“I take vitamin C I take herbs I take Chinese mushrooms like Mitaki shitaki RI these are all great cocktails”
on The Dr. Hyman Show, at 05:19 · positive
“I take vitamin C I take herbs I take Chinese mushrooms like Mitaki shitaki Rishi these are all great cocktails you can use to help”
on The Dr. Hyman Show, at 51:54 · positive
“a little extra zinc a little extra vitamin C omega-3 fats that's sort of a basic stack that most people do”
on The Dr. Hyman Show, at 03:34 · partly
“help support your adrenals vitamins and minerals just a good multivitamin vitamin C zinc uh B complex even with B5”
Dr. Andy Galpin, on FoundMyFitness, at 2:10:06
Partly Video · Opinion
Open the tape at 2:10:06 →“We're not just giving it to people besid like a standard like magnesium or omega-3. We will use it judiciously in different things.”
Alan Aragon, on Huberman Lab, at 2:18:56
Partly Video · Opinion
Open the tape at 2:18:56 →“I take vitamin C. Extra vitamin C, a gram a day.”
David Perlmutter, on The Dr. Hyman Show, at 58:14
Partly Video · Opinion
Open the tape at 58:14 →“vitamin c which aids in excreting uric acid your vitamin c has been the darling supplement for gout patients for decades and that would be again about 500 milligrams per day”
Vitamin C supplements support immune function.
Mark Hyman, 3 mentions on this claim
Positive Video
on The Dr. Hyman Show, at 01:30 · positive
“I take vitamin C I take herbs I take Chinese mushrooms like Mitaki shitaki RI these are all great cocktails you can use to help”
on The Dr. Hyman Show, at 05:19 · positive
“I take vitamin C I take herbs I take Chinese mushrooms like Mitaki shitaki Rishi these are all great cocktails you can use to help”
on The Dr. Hyman Show, at 51:54 · positive
“you might want to take a little extra zinc a little extra vitamin C omega-3 fats”
Dr. Andy Galpin, on FoundMyFitness, at 2:07:18
Partly Video · Opinion
Open the tape at 2:07:18 →“for any kind of immune support that we can have. I I'm not I do not hesitate to go to a gram of vitamin C.”
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This report on Vitamin C draws on 182 videos (134 hours analyzed) out of 3,700+ hours of recorded interviews with 380 researchers and doctors, plus 48,500+ research studies. Every mention of a claim gets a stance, and the verdict is worked out from all of them, never written by hand.
The full report adds 8 key findings and the dose and protocol. It also has the verdict on every claim, a receipt for each mention, the risks to check, and what combines with it.
Get dosages, timing and the verdict on every claim with its receipts for Vitamin C.