Selank

Selank is a small calming peptide. It is made of seven amino acids.

It is based on a natural piece of an immune protein called tuftsin. A Russian lab designed it to ease anxiety without the heavy, foggy feeling that some anti-anxiety drugs cause.

In Russia it has been an approved anxiety medicine since 2009. Outside Russia, it is not a medicine. It is sold "for research only."

So be honest with yourself about which lane you are in. A real Russian drug and a research chemical can both be true for the same peptide.

People use it for everyday anxiety. Think general nervousness or social anxiety.

Some people try it when they do not want to start an SSRI (a common antidepressant) yet, or when one did not work for them. Tech workers and streamers like that it is subtle and short-acting.

It is not for severe panic disorder or OCD. Those need a real treatment plan with a doctor.

Maybe, for ordinary anxiety, but the whole case rests on Russia's own studies.

There are zero English-language randomized trials. There are about 10 Russian-language clinical reports, mostly on general anxiety. The trouble is, it is hard to check how well those studies were run from outside. There are also about 40 animal studies.

So the honest read is: Russia approved it on its own evidence, but the wider world has not confirmed it. If you try it, treat it as an experiment, not a proven cure.

You take it in the nose, as drops or a spray. That is the route the Russian studies used.

The Russian label points to 1 to 3 doses a day for about 7 to 14 days. Exact amounts vary by how strong the RUO product is.

Do not inject it. The data is for the nose route, not for shots. If you run it, set a short window (a couple of weeks) and rate your anxiety at the start and weekly so you can tell if it did anything.

The serious stuff

The biggest warning is about mixing. Selank seems to touch the brain's serotonin system. Do not stack it with antidepressants or similar drugs (SSRIs, SNRIs, MAOIs), or with tramadol or triptans. Mixing could raise the risk of a dangerous reaction called serotonin syndrome. The Russian studies never tested this combo, so it is uncharted. Do not add it without your own prescriber.

If you are pregnant or breastfeeding, skip it. There is no human safety data.

Be careful with benzodiazepines too. Selank may add to their calming effect, so you could get more drowsy.

The common stuff

The Russian reports did not flag major side effects. But "none reported in one country's papers" is not the same as a clean, proven safety record.

Talk to a real doctor, especially if you take any mental-health medicine. We are not your doctor.

Here are the lanes from safest to riskiest.

• Brand (Russia). A real approved nose product, about $30 to $50 a month at Russian retail. But bringing it into the US is legally restricted.
• Compounded. A few US pharmacies make a nose version, about $80 to $200 a month. This is the closest US-legal match to the Russian product.
• Research-only (RUO). The main lane outside Russia, about $25 to $70 a month. Sold "for research only." You usually have to mix your own nose spray.
• Gray market. Overseas raw powder, about $7 to $9 a month. Unregulated import.