Protandim dosage and evidence
Written by Aaron CuhaReviewed Sep 2026
The short answer
Protandim is a supplement brand that really did make male mice live longer in the US government testing program. Almost no supplement can say that. It raised typical lifespan only, in males only, and there is no ageing data in people.
Evidence grade for Protandim: Animal or lab only. The rule: only animal or lab studies on this page. No study in people yet. The sum on this page: 1 animal study, no human study. A grade counts how much has been done to people, not whether it works.
- People given it
- 0
- Human studies
- 0
- Found nothing
- 0
Dose
No human dose established
No published study on this page has given this compound to people and reported a result.
1 animal study, no human study
5 effects reported, 4 unwanted, 1 wanted, by people using it, not a trial
In plain English
In plain English, from Aaron
This is how I would explain it to a friend. The evidence, with the numbers, is further down the page.
This is a supplement made of five plant extracts. They switch on the cell's own defence genes. It really did make male mice live longer in the US government testing program. Almost no supplement can say that.
What people take it for
- Living longer, because of that mouse result.
- Turning on the body's own defences instead of swallowing antioxidants.
- General health, because it is sold that way.
What studies in people showed
No study in people has looked at lifespan, healthy years or any ageing measure. In mice, the government program found male mice lived longer on average. The company did not run that test, which is what makes it worth reporting. But the longest lived mice did not gain. Female mice got nothing. And it is a five part mix, so nobody can say which part did the work. The result belongs to that exact blend.
What people report
Reports, not study results
The good
- We have not collected user reports on this one yet.
- It is sold openly and you can buy it without a prescription.
The bad
- It is sold mostly through multi-level marketing. This site's owner tells people to avoid that way of buying.
- No study in people has measured lifespan or healthy years.
- It did nothing for female mice, and did not raise the longest lifespan in males.
- Because it is a mix, no single ingredient can be credited or checked.
Where these come from: The mouse result and the mix details come from the studies on this page. No user reports have been collected.
My bottom line
Real mouse result, real narrow, sold through a channel I tell people to skip. Not a buy for me.
An opinion, not a finding. I am a coach, not a doctor.
What it has been measured to do
Nothing indexed yet
The 1 citation on this page do not report a result for any of the 36 goals indexed here. Most of what sits here is something else: a listing of a planned study, a study of how the body handles the drug, a safety report or a government record. None of those tests whether it works.
Show full evidence
What is Protandim?
Protandim is a supplement brand that really did make male mice live longer in the US government testing program. Almost no supplement can say that. It raised typical lifespan only, in males only, and there is no ageing data in people.
Protandim is an odd one for this site. It is sold through multi-level marketing. Yet it was tested by the National Institute on Aging, not by the company, and it got a real result.
No study in people has looked at lifespan, healthy years or any ageing measure.
In mice, the government testing program found it raised the typical lifespan of males. That is a real finding from the most careful lifespan testing there is. The company did not control the study.
The honest version needs the rest of the sentence. Typical lifespan only, not the longest. Males only, not females. Mice, not people.
It is a mix of five plant extracts. They switch on Nrf2, a master switch for the cell's own antioxidant defences. That puts it in the same family as dimethyl fumarate on this site. That drug's lifespan test was spoiled because the mice got too little of it.
How does Protandim work?
It is a mix of plant extracts: milk thistle, bacopa, ashwagandha, green tea and turmeric. They were picked to switch on Nrf2, a protein that turns on the cell's antioxidant genes. Normally another protein, KEAP1, holds Nrf2 back. Under chemical stress, Nrf2 is let go. It then switches on genes such as the ones that make glutathione and haem oxygenase 1. The idea is indirect. Instead of adding antioxidants, it nudges the cell to make its own. That matters because taking antioxidants directly has failed again and again to extend lifespan. Because it is a mix, no effect can be pinned on any one ingredient.
What have studies in people found about Protandim?
None for ageing. No study in people has looked at lifespan, healthy years or any ageing measure.
- We found no study in people on lifespan or healthy years.
- It is a mix of five ingredients, so no effect can be pinned on any single one.
- It is sold mostly through multi-level marketing. This site's owner tells people to avoid that way of selling as a general rule.
- The lifespan result is in mice: males only, and typical lifespan only.
What this does not tell you: The result is real and narrow: typical lifespan, males only, mice. Because it is a mix, the result belongs to that exact blend. It does not carry over to Nrf2 boosting in general, or to any other Nrf2 product. The bigger question of whether Nrf2 helps lifespan is still open. The one test of a well-known Nrf2 drug gave the mice only 35 percent of the planned dose.
The state of the research
This page tests whether the site will report a result it might rather not. Protandim is sold through multi-level marketing. This site's owner tells people to avoid exactly that. Yet it made mice live longer in the most careful mouse program there is. A government agency tested it, not the company.
Reporting that honestly means reporting all of it. Typical lifespan only. Males only. Mice only. No ageing data in people. And it is a mix, so no single ingredient gets the credit.
It is also worth setting next to the dimethyl fumarate page here. That is a well-known Nrf2 drug. In its lifespan test, the mice got on average 35 percent of the planned dose, and it did nothing. The authors said the low dose is the likely reason. So right now the Nrf2 idea has one win, from a plant mix in male mice, and one spoiled test of a drug. That does not settle it either way.
Here is the part most coverage skips. Several of this program's most reliable wins made male mice live longer and did nothing for female mice. This is not a case of too few mice. The female results simply do not move. Nobody knows why. Guesses include that males and females break the drug down differently, that they die of different things, or that their hormones differ. In practice, when a headline says a compound makes mice live longer, it often means half the mice. It usually does not say which half.
The evidence, in charts
Fig. 1a · how many people
0people have taken this in any study cited here
0 people · 0 studies in people
What this page cites instead is 1 animal study. None of them gave the compound to a person.
Counted from the list of sources on this page. We draw this chart only when a study in people is cited. An empty one is the answer, not a gap in the page.
Fig. 1b · evidence mix
None of the 1 source here is a study in people.
- Animal study · done in animals1100%
Counted from the list of sources on this page. It counts only what we cite, so there may be more studies out there. A review counts once, however many studies it sums up.
Fig. 2 · evidence over time
Every source here was published in 2016.
Too few different years on this page to draw a timeline. The newest source on file is from 2016, more than five years ago. Research on it may have gone quiet.
Fig. 3 · legal status at a glance
US
Not approved
UK
Not approved
AU
Not approved
CA
Not approved
Not approved in any of the four countries shown. This is what the law says, not a verdict on the science. See Legal status below for the full text and any notes.
Fig. 4 · how much does what
Nobody has tested different amounts in people
This chart would show how the effect changes as the amount goes up. For this compound, nobody has measured that in people. So we leave it empty. We will not borrow an animal chart and pretend it works the same in people.
Fig. 5 · what the molecule is
- Kind of compound
- Supplement
- Molecule weight
- Not applicable. A five-component botanical mixture.
- Half-life
- Stated in words, not a numbersee the exact wording below
- Chain length
- None on file
Half-life as stated on file: Not meaningfully described. It is a mixture of botanical extracts with differing kinetics rather than a single compound.
No amino acid sequence is on file for Protandim, which is expected: a supplement is not built from amino acids.
The studies we cite
- Animal study2016Longer lifespan in male mice treated with a weakly estrogenic agonist, an antioxidant, an alpha-glucosidase inhibitor or a Nrf2-inducer
In mice, a supplement really did help, which is rare. Protandim, a mix of plant extracts, raised the typical lifespan of male mice in the government testing program. It did nothing for females. The company did not run this test, which is what makes it worth reporting.
Interventions Testing Program. Protandim, described as a mixture of botanical extracts that activate Nrf2, extended median lifespan in males only. Independent government testing of a commercial supplement, which is rare and is what makes this result worth reporting.
Common questions
Has Protandim been tested in people?
Not in any study cited here. Protandim is a supplement brand that really did make male mice live longer in the US government testing program. Almost no supplement can say that. It raised typical lifespan only, in males only, and there is no ageing data in people.
What is the Protandim dosage?
No human dose established. No published study on this page has given this compound to people and reported a result. 1 animal study, no human study
Is Protandim FDA-approved?
Sold as a dietary supplement. Not an approved drug and not approved to prevent or treat anything.
Did Protandim really extend lifespan?
In male mice, yes. It raised their typical lifespan in the National Institute on Aging's testing program, which tested it without the company. That is a real result, and rare for a supplement. It did not raise how long the longest-lived mice got. It did nothing in females. There is no ageing data in people.
Does that mean I should take it?
It means one thing has been shown in male mice. No study in people has looked at lifespan, healthy years or any ageing measure. A male-only mouse result on typical lifespan is a reason to keep studying something. It is not a reason to buy it.
Which ingredient is doing the work?
Nobody knows, and this evidence cannot tell us. It is a mix of five plant extracts, and the test used the whole mix. The result belongs to that exact blend. It does not carry over to any other Nrf2 product or to any single ingredient.
Is Nrf2 activation a real longevity strategy?
Still open. Protandim is the good news. The bad news is dimethyl fumarate, a well-known Nrf2 drug. Its lifespan test gave the mice only 35 percent of the planned dose and found nothing, and the authors said that may explain it. So one mix worked in male mice, and one drug was never tested properly.