Protandim
Protandim, botanical Nrf2-activating mixture
Written by Aaron CuhaReviewed Sep 2026
Also known as: Nrf2 Synergizer, Protandim NRF2
A commercial supplement that genuinely extended male mouse lifespan in the government testing programme, which almost no supplement can claim. Median only, males only, and no human ageing data.
Overview
Protandim is unusual on this site: a product sold through multi-level marketing that was independently tested by the National Institute on Aging and produced a real result.
In the Interventions Testing Program it extended median lifespan in male mice. That is a genuine finding from the most rigorous lifespan testing apparatus that exists, obtained without the company controlling the study.
The honest framing requires the rest of the sentence. Median lifespan only, not maximal. Males only, not females. Mice, not people. And no human trial has examined lifespan, healthspan or any ageing endpoint.
It is a mixture of five botanical extracts that activate Nrf2, the transcription factor controlling the antioxidant response, which places it in the same mechanistic family as the dimethyl fumarate entry on this site whose lifespan test was compromised by underdosing.
Mechanism of action
A combination of botanical extracts including milk thistle, bacopa, ashwagandha, green tea and turmeric, selected to activate nuclear factor erythroid 2-related factor 2. Nrf2 is held inactive by KEAP1 and released under electrophilic stress, whereupon it drives transcription of antioxidant response element genes including glutathione synthesis enzymes and haem oxygenase 1. The proposed logic is indirect: rather than supplying antioxidants, it prompts the cell to make its own, which avoids the problem that direct antioxidant supplementation has repeatedly failed to extend lifespan. Being a mixture, no effect can be attributed to any single component.
Human evidence
None for ageing. No human trial has examined lifespan, healthspan or any geroscience endpoint.
- No human lifespan or healthspan trial was located.
- The lifespan evidence is a male-only median extension in mice.
- It is a five-component mixture, so no effect can be attributed to any single ingredient.
- It is sold largely through multi-level marketing, a distribution model this site's owner recommends avoiding on general principle.
What this does not tell you: The result is real and narrow: median lifespan, males only, mice. Because it is a mixture, the finding belongs to that specific combination and formulation rather than to Nrf2 activation in general, and it does not transfer to any other Nrf2 product. The wider Nrf2-and-lifespan question remains open, since the one attempt with a well-characterised pharmaceutical Nrf2 activator delivered only 35 percent of its target dose.
Reading the research record
This page is a test of whether the site can report a result it might prefer not to. Protandim is sold through multi-level marketing, which is exactly the distribution model this site's owner tells people to avoid, and it nonetheless produced a genuine lifespan extension in the most rigorous mouse programme in existence, tested independently by a government agency rather than by its manufacturer.
That deserves reporting accurately, which means reporting all of it: median lifespan, males only, in mice, with no human ageing data, in a mixture where no individual ingredient can be credited.
It is also worth setting beside the dimethyl fumarate entry here. That compound is a well-characterised pharmaceutical Nrf2 activator whose lifespan test delivered an average of 35 percent of the target dose and found nothing, with the authors offering the underdosing as the likely explanation. So the Nrf2 hypothesis currently has one positive from a botanical mixture in male mice and one compromised null from a pharmaceutical. That is not a settled picture in either direction.
The male-specific pattern is the most under-discussed finding in this whole field. Several of the programme's most reliable positives extend lifespan in male mice and not in female mice, and the effect is not a matter of statistical power: the female curves simply do not move. Nobody has established why. Proposed explanations include differences in drug metabolism, in baseline mortality causes between the sexes in this strain, and in hormonal context. What it means practically is that a headline reading a compound extends lifespan in mice is frequently describing an effect in half the animals, and that half is usually not stated.
The evidence, charted
Fig. 1 · evidence composition
0of 1 citation (0%) is in people
Every citation cited here is Animal work; no other study type is cited on this page. This count is of our own citation list and understates any literature larger than the sources we cite.
Fig. 2 · evidence over time
Every citation here was published in 2016.
Too few distinct publication years on this page to plot as a timeline. The newest citation on file is from 2016, more than five years ago; the published record 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 jurisdictions shown. A jurisdiction's classification is a regulatory fact, not a verdict on the science; see Legal status below for the full text and any notes.
Fig. 4 · dose response
No human dose response curve exists
We draw this figure where the data supports it. For this compound in humans it does not, so the panel stays empty rather than borrowing an animal curve and implying it transfers.
Key studies & citations
- Animal2016
Longer lifespan in male mice treated with a weakly estrogenic agonist, an antioxidant, an alpha-glucosidase inhibitor or a Nrf2-inducer
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.
Aging Cell
Frequently asked questions
Did Protandim really extend lifespan?
In male mice, median lifespan, in the National Institute on Aging's testing programme, tested independently of the manufacturer. That is a real result and it is rare for a commercial supplement. It did not extend maximal lifespan, it did nothing in females, and there is no human ageing data.
Does that mean I should take it?
It means one thing has been shown in male mice. No human trial has examined lifespan, healthspan or any ageing endpoint. Male-only mouse median lifespan is a reason to keep studying something, not a reason to buy it.
Which ingredient is doing the work?
Unknown, and unknowable from this evidence. It is a five-component botanical mixture and the trial tested the mixture. The result belongs to that specific combination and does not transfer to any other Nrf2 product or to any single ingredient.
Is Nrf2 activation a real longevity strategy?
Open. This is the positive side. The negative side is dimethyl fumarate, a well-characterised pharmaceutical Nrf2 activator whose lifespan test delivered only 35 percent of the intended dose and found nothing, with the authors saying that may explain it. One mixture worked in male mice and one drug was inadequately tested.