Anti-Aging · Reference
Is FOXO4-DRI Banned in Sports? WADA Status, S0 and Drug Tests
This page is general information, not legal or anti-doping advice. Lists are revised every year, and the responsibility for checking sits with the athlete.
Treatments mentioned
FOXO4-DRI is not named on the 2026 WADA Prohibited List, but that does not make it permitted: the S0 class prohibits, at all times, any pharmacological substance with no current approval by any governmental health authority for human therapeutic use, and FOXO4-DRI has no such approval anywhere. WADA's own note on the 2027 List says a peptide that is not specifically named may still be prohibited. If you are in a tested pool, treat FOXO4-DRI as off limits unless your anti-doping organization tells you otherwise in writing. A prescription does not change that, and a standard workplace drug screen does not look for FOXO4-DRI at all.
This page is general information, not legal or anti-doping advice. Lists are revised every year, and the responsibility for checking sits with the athlete.
Is FOXO4-DRI Banned in Sports? WADA Status, S0 and Drug Tests
The short answer
| The question you are asking | The answer |
|---|---|
| Is FOXO4-DRI named on the WADA Prohibited List? | No, not on the 2026 List |
| Can it still be prohibited? | Yes. The S0 class covers substances without regulatory approval for human therapeutic use, and FOXO4-DRI has never been approved anywhere |
| Prohibited in competition only, or all the time? | S0 is prohibited at all times, in and out of competition |
| Does a prescription change that? | No. Only a therapeutic use exemption granted in advance does |
| Is it in any Pepti blend? | No. FOXO4-DRI is supplied only as a single-agent vial |
| Will it show up on a workplace drug test? | No. Employment panels screen for drugs of abuse, not peptides |
| Is FOXO4-DRI FDA approved? | No. Compounded medications are not FDA approved |
Is FOXO4-DRI Banned in Sports? WADA Status, S0 and Drug Tests
Why "not named" is not the same as "allowed"
Most people asking this question search the Prohibited List, do not find "FOXO4-DRI" or "FOXO4 D-retro-inverso", and conclude they are fine. The List is not built to work that way.
The S0 class, in its own words
S0, Non-Approved Substances, prohibits at all times "any pharmacological substance which is not addressed by any of the subsequent sections of the List and with no current approval by any governmental regulatory health authority for human therapeutic use." It gives examples, BPC-157 among them, but the examples are not the limit of the class. A substance does not need to be named. It needs only to lack regulatory approval for human therapeutic use and not be captured by another section.
FOXO4-DRI fits that description closely. It is a designed laboratory peptide, first described in a 2017 paper in Cell, and it has never been through a human clinical trial, let alone a drug approval. It is not a growth hormone secretagogue, a hormone or a metabolic modulator, so the other named sections are not the obvious home for it. S0 is.
WADA's warning about unnamed peptides
The explanatory note to the 2027 Prohibited List puts it directly: "Many peptides, not approved for human use by regulatory authorities, fulfill the criteria of the World Anti-Doping Code for inclusion on the Prohibited List and fall under the S0 (Non-Approved Substances) class, or other classes (such as S2 or S4). Even if a peptide is not specifically named on the List, utmost caution should be taken as it may still be prohibited."
That is WADA saying, in plain terms, that absence from the List is not permission. Live Pepti guidance says the same thing: do not reason from "I could not find it on the list" to "it is permitted."
What S0 status would mean in practice
Feature of S0 What it means for an athlete Prohibited at all times No off-season. Use in a training block months from an event counts the same as use on race day Specified Substance Affects how a panel weighs the circumstances at sanctioning. It is not a lesser prohibition Based on approval status The class is about the lack of approval, not a finding that the substance enhances performance Unchanged for 2027 The 2027 List keeps the S0 structure and the same named examples
Is FOXO4-DRI Banned in Sports? WADA Status, S0 and Drug Tests
How FOXO4-DRI differs from the named peptides
| Product | How the List treats it | Price |
|---|---|---|
| FOXO4-DRI | Not named; no human therapeutic approval anywhere, so S0 can reach it | $229/mo |
| BPC-157 | Named under S0, prohibited at all times | $209/mo |
| MOTS-c | Named under S4.4.1 among AMPK activators, prohibited at all times | $259/mo |
| SS-31 | Not named; an elamipretide product received FDA accelerated approval for Barth syndrome in 2025, which bears on S0. Confirm first; see is SS-31 banned in sports | $249/mo |
| Epithalon | Not named; S0 can reach it, see is epithalon banned in sports | $249/mo |
Prices are all-in monthly figures covering the medication, physician review, refill management and shipping. There is no separate membership fee. If you are combining FOXO4-DRI with anything else, every component has to be checked separately; a regimen is prohibited if any part of it is.
Is FOXO4-DRI Banned in Sports? WADA Status, S0 and Drug Tests
A prescription is not an exemption
Anti-doping rules work independently of prescribing law. A licensed physician can prescribe FOXO4-DRI, a licensed pharmacy can dispense it, and its use can still be an anti-doping violation for someone in a tested pool.
Strict liability
Article 2.1.1 of the World Anti-Doping Code makes it "the Athletes' personal duty to ensure that no Prohibited Substance enters their bodies," and states that intent, fault, negligence or knowing use do not need to be shown to establish a violation. Fault is weighed later, when consequences are decided. It does not stop the violation being established.
Therapeutic use exemptions
A TUE is the only route by which an athlete may use a prohibited substance. The International Standard sets four conditions: a diagnosed medical condition supported by clinical evidence, no additional enhancement of performance beyond a return to normal health, no reasonable permitted therapeutic alternative, and a need that is not the result of earlier prohibited use. FOXO4-DRI has no human trial data for any condition, which makes a TUE case very hard to build. In the United States, athletes in USADA's testing pools must hold a TUE in advance. A telehealth prescription is not a TUE, and no prescriber can grant one.
Stored samples
Under Code Article 6.6, a sample reported negative may be stored and reanalysed later, and Article 17 sets a ten-year limit for bringing a charge. "There is no test for it yet" is not a plan.
Is FOXO4-DRI Banned in Sports? WADA Status, S0 and Drug Tests
Workplace and other drug tests
Employment testing is a different system with a different purpose. The federal panel set out in 49 CFR 40.85 tests for marijuana metabolites, cocaine metabolite, opiates, semi-synthetic opioids, 6-acetylmorphine, phencyclidine, amphetamines and MDMA. No peptide appears on it, and FOXO4-DRI has no structural relationship to any of those targets. The full breakdown is in do peptides show up on a drug test.
| Type of test | Does it look for FOXO4-DRI? | What to do |
|---|---|---|
| Pre-employment or workplace panel | No | Declare prescriptions through the confidential route if asked |
| Expanded panel in a safety-sensitive role | Expanded panels add drugs of abuse, not peptides | Ask what your panel covers |
| Anti-doping test in tested sport | The rule is about use, not detection | Ask your anti-doping body before starting |
| Military, law enforcement, regulated professions | Policies vary and some are stricter | Read your own policy |
| Clinical testing before surgery | A safety question, not a screen | Tell the treating clinician everything you take |
Is FOXO4-DRI Banned in Sports? WADA Status, S0 and Drug Tests
College and professional sport
The NCAA runs its own banned drug classes rather than the WADA List. Its class "peptide hormones, growth factors, related substances and mimetics" names examples such as BPC-157 and TB-500, and the NCAA states that any substance chemically or pharmacologically related to a banned class is also banned even if it is not listed. FOXO4-DRI is not one of the named examples, which means the question goes to your athletics health care provider before you start, not after. Professional leagues mostly run their own programs under collective bargaining, so the only correct source there is your league's current policy.
Is FOXO4-DRI Banned in Sports? WADA Status, S0 and Drug Tests
Where FOXO4-DRI stands with the FDA
This is a separate axis from sport. FOXO4-DRI does not appear in Category 1, Category 2 or Category 3 of the FDA's 503A nominated-substances document, most recently updated 14 May 2026. It is not on the FDA's page of bulk substances that may present significant safety risks, current as of 22 April 2026, and it is not on the positive 503A bulks list at 21 CFR 216.23. It was not on the agenda of the Pharmacy Compounding Advisory Committee's July 2026 meeting or the meeting announced for early 2027. The FDA has not evaluated it either way.
None of that changes anti-doping status. Even a favourable compounding decision would not be a regulatory approval for human therapeutic use, and S0 turns on approval. The general picture is in are peptides FDA approved and do you need a prescription for FOXO4-DRI.
Is FOXO4-DRI Banned in Sports? WADA Status, S0 and Drug Tests
What the evidence shows, honestly
FOXO4-DRI is an experimental senolytic: a designed peptide meant to remove senescent cells by disrupting the FOXO4 and p53 interaction. The evidence is mouse work, including restored running-wheel activity in aged mice in the 2017 Cell paper, and human cells studied in a dish. There are no human trials of any kind, and no study has measured athletic performance or recovery in people. None of that bears on whether it is prohibited: S0 is a rule about approval status, not a finding that a substance improves performance. The research is covered in what is FOXO4-DRI and FOXO4-DRI benefits, and athletes' wider questions in peptides for athletes.
Is FOXO4-DRI Banned in Sports? WADA Status, S0 and Drug Tests
If you compete: what to do
| Your situation | What to do |
|---|---|
| In a tested pool at any level | Do not start FOXO4-DRI without written confirmation from your anti-doping organization |
| You have a genuine medical need | Ask about a TUE, in advance, through your national anti-doping organization |
| You already took something | Talk to your sport's anti-doping body or team physician |
| You are a recreational athlete not subject to testing | The anti-doping rule does not reach you; everything else on this page still applies |
| You are considering a research-labelled vial | Do not. Under strict liability, unverified contents are your problem; see research peptides vs prescription peptides |
Check the medication on Global DRO, the database USADA directs athletes to, and keep the reference number it gives you. That number is your record that you checked. A table on a website, including this one, is not a compliance document.
Is FOXO4-DRI Banned in Sports? WADA Status, S0 and Drug Tests
Where to get FOXO4-DRI prescribed
FOXO4-DRI cannot be bought legitimately without a prescription. Sites selling it "for research use only" are not accountable for identity, purity, sterility or concentration. The prescription route:
- Complete a free online intake covering your history, medications and what you want help with. If you are subject to testing, say so on the intake.
- A physician licensed in your state reviews it, usually within 24 hours.
- If it is appropriate, a PCAB-accredited, FDA-registered US 503A pharmacy compounds it to that prescription. Lot test results are published at /quality/lab-results.
- It ships refrigerated with ice packs, sterile syringes and alcohol prep pads, and your directions printed on the vial.
- Your care team stays reachable through your account.
Pepti is cash-pay and does not bill insurance. It prescribes in most US states, not currently in Oklahoma, and the assessment confirms availability for your state. Step by step: how to get FOXO4-DRI prescribed online.
References
What this is based on.
References
- Baar MP, Brandt RMC, Putavet DA et al.. Targeted Apoptosis of Senescent Cells Restores Tissue Homeostasis in Response to Chemotoxicity and Aging · Cell (2017) · PMID 28340339
- Bourgeois B, Spreitzer E, Platero-Rochart D et al.. The disordered p53 transactivation domain is the target of FOXO4 and the senolytic compound FOXO4-DRI · Nature Communications (2025) · PMID 40593617
- Zhang C, Xie Y, Chen H et al.. FOXO4-DRI alleviates age-related testosterone secretion insufficiency by targeting senescent Leydig cells in aged mice · Aging (Albany NY) (2020) · PMID 31959736
- Huang Y, He Y, Makarcyzk MJ et al.. Senolytic Peptide FOXO4-DRI Selectively Removes Senescent Cells From in vitro Expanded Human Chondrocytes · Frontiers in Bioengineering and Biotechnology (2021) · PMID 33996787
- Liu Y, Hou Q, Wang R et al.. FOXO4-D-Retro-Inverso targets extracellular matrix production in fibroblasts and ameliorates bleomycin-induced pulmonary fibrosis in mice · Naunyn-Schmiedeberg's Archives of Pharmacology (2023) · PMID 37074394
- Li Y, Zhang C, Cheng H et al.. FOXO4-DRI improves spermatogenesis in aged mice through reducing senescence-associated secretory phenotype secretion from Leydig cells · Experimental Gerontology (2024) · PMID 39025385
- Hu Z, Li F, Hu C et al.. FOXO4-DRI regulates endothelial cell senescence via the P53 signaling pathway · Frontiers in Bioengineering and Biotechnology (2026) · PMID 41625068
- Kong YX, Li ZS, Liu YB et al.. FOXO4-DRI induces keloid senescent fibroblast apoptosis by promoting nuclear exclusion of upregulated p53-serine 15 phosphorylation · Communications Biology (2025) · PMID 39994346
- Born E, Lipskaia L, Breau M et al.. Eliminating Senescent Cells Can Promote Pulmonary Hypertension Development and Progression · Circulation (2023) · PMID 36515093
Citations are provided for educational purposes. They do not constitute medical advice. Always discuss any peptide protocol with your prescribing physician.
Common questions
Is FOXO4-DRI Banned in Sports? WADA Status, S0 and Drug Tests, answered.
It is not named on the 2026 WADA Prohibited List. The S0 class prohibits any pharmacological substance with no current approval by any governmental health authority for human therapeutic use, and FOXO4-DRI has no such approval. A tested athlete should treat it as prohibited unless their anti-doping organization says otherwise.
Searching the List for FOXO4-DRI or "D-retro-inverso" returns nothing, which is exactly why the S0 catch-all matters. Not being named is not permission.
Not on a workplace or pre-employment panel, which looks for a fixed list of drugs of abuse. In tested sport the rule is about use, not detection, and samples can be stored and reanalysed for up to ten years.
Not safely if you are in a tested pool. S0 is prohibited in and out of competition, so there is no permitted window.
No. A prescription is valid medicine, but anti-doping rules operate independently of prescribing law. Only a therapeutic use exemption granted in advance makes use of a prohibited substance permitted.
It is not one of the NCAA's named examples, but the NCAA states that anything chemically or pharmacologically related to a banned class is also banned. Ask your athletics health care provider before starting.
No. It does not appear in any category of the FDA's 503A list and is not on the significant-safety-risk page. The FDA has not evaluated it either way, and it is not FDA approved.
No study has measured performance in people. The 2017 mouse study reported restored running-wheel activity in aged mice, which is not a human performance result.
No. S0 exists for substances without regulatory approval for human therapeutic use. Inclusion follows from approval status, not from any demonstration of performance benefit.
Bloodwork is not required for any Pepti treatment. If your physician wants labs for your care, they'll ask through your account. The free assessment goes to a physician licensed in your state. A consultation does not guarantee a prescription.
Next step
See what a physician recommends for you.
A licensed physician in your state reviews your intake and decides what is appropriate. A consultation does not guarantee a prescription.