SS-31 user experiences: what users themselves report
Users’ own accounts, not research. The accounts are self-selected and prove neither that it works nor that it is safe.
This page does not list users’ doses or sellers, and no figure on it is a recommendation. Doses used in studies, with sources: SS-31 dosage in studies.
In short
Of 69 people, 44 (64%) said SS-31 brought some benefit and 32 (46%) some harm.
- An AI model read and classified 300 public Reddit posts one by one, following written instructions. 78 were first-hand accounts, from 69 different people.
- Benefits mentioned most often: more energy or alertness (22, 32%), endurance or exercise performance (6, 9%) and mood (5, 7%).
- Harms mentioned most often: fatigue (13, 19%), anxiety or restlessness (4, 6%) and insomnia (4, 6%). In addition, 12 (17%) described some other, rarer harm. People tend to post when something goes wrong, so this share does not tell how common harms are.
- 40 of 69 people (58%) used other substances at the same time, most often MOTS-c (21), NAD+ (14) and retatrutide (11). So the figures describe use that included SS-31, not SS-31 on its own.
- The accounts cannot separate the substance from placebo or other causes. What the research shows: SS-31: what the research shows.
Where the accounts come from and how we read them
Sources: the Reddit forums r/Peptides (53 accounts), r/Biohackers (22), r/Nootropics (1), r/Retatrutide (1) and r/bpc_157 (1), 15 Oct 2024 to 27 Sep 2026. The posts were retrieved from a public Reddit archive. From first-person posts about SS-31, 300 were picked at random, and every one was read.
Coding: for each account we recorded the route, reported benefits and harms, how strong a harm was, whether and why the person stopped, length of use and other substances used at the same time. We kept accounts that reported some effect, some harm, or no effect. Questions and plans were left out. A harm was recorded when the person reported it during use, even if the cause was uncertain. Several posts by one person count as one person. One person can mention several things, so the shares in the tables do not add up to 100.
Check: an AI model read and classified the posts following written instructions. A second, separate AI run classified a random tenth (30 posts) again without seeing the first classification. The main fields matched: 29/30 (97%).
Whose accounts these are: routes mentioned: injection 69; the others did not say. The figures describe the writers and are not a recommendation. The products were not verified, so we do not know what people actually took.
Did SS-31 help? The overall picture
Of 69 people, 33 (48%) reported benefit only, 11 (16%) both benefit and harm, 21 (30%) harm only and 4 (6%) neither.
Stopping. 5 people (7%) said they stopped or paused: 5 because of harms and 0 because they noticed no effect or for another reason.
| Overall picture: benefit, harm or neither | People | Share |
|---|---|---|
| Benefit only | 33 | 48% |
| Both benefit and harm | 11 | 16% |
| Harm only | 21 | 30% |
| Neither benefit nor harm | 4 | 6% |
Most common reported benefits
Of 69 people. 44 (64%) mentioned some benefit; the table lists every benefit reported.
| Reported | People | Share |
|---|---|---|
| More energy or alertness | 22 | 32% |
| Endurance or exercise performance | 6 | 9% |
| Mood | 5 | 7% |
| Focus or thinking | 4 | 6% |
| Chronic illness symptoms eased | 3 | 4% |
| Vision or eyes | 2 | 3% |
| Recovery | 2 | 3% |
| Better sleep | 2 | 3% |
| Other benefit | 15 | 22% |
Share = people / 69.
Most common reported harms
Of 69 people. 32 (46%) mentioned some harm; 0 said explicitly they had none.
| Reported | People | Share |
|---|---|---|
| Fatigue | 13 | 19% |
| Anxiety or restlessness | 4 | 6% |
| Insomnia | 4 | 6% |
| Palpitations, heart rate or blood pressure | 3 | 4% |
| Flu-like symptoms or fever | 2 | 3% |
| Injection site pain or reaction | 2 | 3% |
| Headache | 1 | 1% |
| Other, rarer harm | 12 | 17% |
Share = people / 69.
How severe were the harms?
Of the 32 people who described how strong a harm was, 19 (59%) described it as mild, 12 (38%) as clearly bothersome and 1 (3%) as severe. The strength is the writer's own description, not a doctor's assessment.
| Strength of the harm as the writer described it | People | Share |
|---|---|---|
| Mild: minor and manageable | 19 | 59% |
| Clearly bothersome: several days, sleep or work affected | 12 | 38% |
| Severe: emergency visit, hospital or unable to function | 1 | 3% |
Harms known from research and regulators: What are the side effects of SS-31?
How long did people use SS-31?
51 of 69 people (74%) said how long they had been using it at the time of writing. Where one person wrote several posts, the longest stated time counts.
| Stated length of use | People | Share |
|---|---|---|
| Under a week | 15 | 29% |
| 1-4 weeks | 17 | 33% |
| 1-3 months | 17 | 33% |
| Over 3 months | 2 | 4% |
Many people post partway through, often in the first days or as soon as harms start, so short times are over-represented. The numbers describe the writers; they do not say how long it should be used.
Other substances at the same time
40 of 69 people (58%) used other substances at the same time. The most common: MOTS-c (21), NAD+ (14) and retatrutide (11). Then the account cannot tell which substance had the effect.
About dosing
We do not repeat the amounts or ways of use people mention, and we give no dosing or how-to instructions. A safe dose is not known. Doses used in studies, with sources: SS-31 dosage in studies and in the label. Legal status: Is SS-31 legal in Finland?
What can be concluded?
Energy was the most common reported benefit and tiredness the most common harm. Many used other substances at the same time, so what SS-31 did cannot be separated.
The accounts prove neither that it works nor that it is safe. The writers are self-selected, the product contents are unknown, many used several substances at once, and placebo effects can be large. The research and its evidence levels: SS-31: what the research shows.
Quotes
Short excerpts in the writers’ own words. Writers’ names and links are not shown. We picked quotes from every group: benefit, both benefit and harm, no effect, harms and people who stopped.
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"the night and day energy and mental clarity is unreal. Things that were a chore a week ago feel like a walk in the park."
r/Peptides, 2026-03, Injected under the skin, about a week of use. Energy and clarity improved within a few days. Energy was the most common benefit reported in the sample.
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"I have a muscular dystrophy and find it removes my fatigue and allows me to walk longer and I get less pain."
r/Biohackers, 2026-09, Injected for about three months. The writer says the symptoms return when use stops. A single report from someone with an underlying disease, not generalisable.
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"Day 4, SS-31 wrecked me → Day 5, I felt like a new person"
r/Peptides, 2026-03, Injected as part of a large stack that also included a GLP-1 drug, NAD+ and MOTS-c. An early slump turned into energy within days, but the share of any single compound cannot be separated.
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"I’m on my second week of taking SS 31 and KPV and I haven’t noticed much."
r/Peptides, 2026-09, Injected for two weeks together with KPV. No clear effect was noticed either way.
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"Since starting it right at 3 weeks ago, I am completely exhausted all the time. My mind feels like it is a scrambled egg most of the time."
r/Biohackers, 2026-03, Injected for about three weeks because of migraine-related brain fog. Fatigue was the most common harm reported in the sample, often right at the start.
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"5 minutes later the walls closed in, my head felt scrambled, I couldn’t catch my breath and I had to go walk outside for 30 minutes"
r/Biohackers, 2026-07, The first injection. The writer had had a similar panic reaction to a GLP-1 drug before, so a general sensitivity may be involved.
Other summaries made with the same method: BPC-157 user experiences, NAD+ user experiences, MOTS-c user experiences, NMN user experiences, Retatrutide user experiences, Tesamorelin user experiences, Epitalon user experiences and user experiences with collagen and skin peptides.
Content is general information about research, not medical advice. If you have symptoms, contact a healthcare professional.