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Someone on Reddit asked where to buy two compounds, phenibut and Selank, after their usual supplier closed. They wanted semi-reliable vendors who will ship to the U.S. The post is a shopping question, not a scientific study, so it’s mostly about where products are being sold online and what people’s experiences have been. Phenibut is a synthetic compound made to act a bit like the brain chemical GABA, which calms activity in the brain. Some people use it for anxiety, sleep, or to take the edge off, and it’s been around for decades in parts of Eastern Europe. Selank is a different synthetic peptide that was developed in Russia; people talk about it for anxiety and cognitive effects. Calling them “peptides” or “nootropics” can be confusing: phenibut is not a peptide, it’s a small molecule; Selank is a short chain of amino acids (a peptide) that’s meant to tweak stress and immune-related signaling. The Reddit thread is a user-to-user marketplace-style question, so the "evidence" there is just other people saying where they bought these things and whether shipments arrived. That kind of information is anecdotal and can change quickly because suppliers come and go. No controlled studies or safety tests are being reported in that kind of thread. If you’re looking for how well they work, that’s a separate question: for phenibut, there’s a mixture of personal reports and some older research suggesting sedative and anxiolytic (anxiety-reducing) effects, but also clear risks. For Selank, most of the human data is limited and largely from Russian research; outside of that, evidence is thin and based mostly on small studies or animal work. Why this matters: people who are struggling with anxiety, insomnia, or who experiment with cognitive enhancers care because they’re seeking relief or performance boosts and sometimes can’t get prescription drugs. The availability of these substances from online vendors is a practical issue—buyers want reliable suppliers that actually ship and send what they advertise. But that convenience comes with important trade-offs: product quality, purity, and legal status can vary, and user experiences differ a lot. Caveats and risks are big here. Phenibut can cause dependence, withdrawal symptoms, and serious side effects at higher or frequent doses; medical supervision is recommended, and it’s controlled or restricted in some places. Selank’s safety profile is less well characterized in broad populations; peptides sold online may not be produced under strict pharmaceutical standards. Legality also varies: some suppliers will not ship to the U.S., or individual states may have their own rules. A Reddit thread doesn’t verify vendor quality or safety, so treating it as reliable medical or legal advice would be risky. Bottom line: the thread is a crowdsourced shopping tip list, not a safety endorsement. If you’re considering phenibut or Selank, check up-to-date legal status, look for third-party testing or reputable labs, and talk to a clinician about risks and safer alternatives.
Source: r/Nootropics