Selank for anxiety and cognition: what the studies actually say

What did @589a589 actually say?

The creator described stopping Selank mid-cycle after experiencing what they identified as anhedonia: "a lack of pleasure, this lack of emotion, this numbness, this lack of sex drive." They were running Semax in the morning and Selank in the evening, about seven days into a 20-day cycle. Their conclusion was that Selank's dopamine and serotonin "modulatory effect" caused the symptoms, and they threw the vial away. They also flagged something genuinely useful: people in a fragile mental state should be cautious with peptides that touch mood-regulating systems. That last point is more responsible than most peptide content on TikTok.

Worth noting: the creator mispronounces both peptides throughout ("C-Max" and "Selenk"), which isn't a factual error but does suggest they're working partly from informal sources rather than primary literature.

Does the science back this up?

Partially, but the mechanism gets muddier the closer you look. Selank has documented effects on serotonergic transmission, and there is preclinical evidence of dopamine involvement, but calling it a clean dopamine suppressant is an oversimplification.

Selank is a synthetic heptapeptide analog of tuftsin, studied primarily in Russian research settings. Semenova et al. (2010, CNS Drug Reviews) found that Selank modulates serotonin metabolism in rat brain tissue and shows anxiolytic properties without the sedation profile of benzodiazepines. Concerning dopamine specifically, the data is thinner. Uchakina et al. (2008, Bulletin of Experimental Biology and Medicine) noted changes in monoamine oxidase activity in patients taking Selank, which could indirectly influence dopamine turnover. But "modulatory" is doing a lot of work here. The research doesn't cleanly support the idea that Selank reliably decreases dopamine in humans in a way that predicts anhedonia.

Anhedonia as a side effect is not documented in the published clinical literature on Selank. That doesn't mean the creator didn't experience it. It means we can't confirm the mechanism they attributed it to.

What did they get wrong (or right)?

They got the anhedonia identification right, at least as a description of their symptoms. Anhedonia is a real clinical phenomenon, and connecting it to a substance they had recently introduced is reasonable self-observation. Credit where it's due.

Where they went wrong is the causal certainty. They concluded definitively that Selank caused the anhedonia via dopamine modulation. But at day seven of a combined Semax and Selank cycle, other variables exist. Semax itself has documented effects on BDNF and dopaminergic pathways (Dolotov et al., 2006, Journal of Neurochemistry). Running both simultaneously makes it nearly impossible to isolate which compound, or which combination, produced the effect. The creator actually acknowledges this briefly, then sets it aside in favor of blaming Selank alone.

They also mention a "calibration effect" where symptoms might resolve if you push through. There is no published evidence supporting this claim. Telling viewers that anhedonia might be temporary and self-correcting, without clinical backing, is the kind of framing that encourages people to tolerate distressing symptoms longer than they should.

What should you actually know?

Selank is not approved by the FDA for any indication. The bulk of the research is Russian, conducted in the 1990s through 2010s, and most trials are small, not replicated in Western peer-reviewed settings, and conducted in preclinical or limited clinical populations. That doesn't make the research worthless, but it means the confidence intervals on any claimed effect, beneficial or adverse, are wide.

The creator's core warning is sound: if your baseline mental state is unstable, introducing compounds that interact with serotonin and dopamine systems carries real risk. This isn't specific to Selank. It applies to any unregulated peptide with CNS activity.

• Selank is not a licensed medication in the United States and is not compounded under FDA oversight for mood indications.
• Anhedonia has multiple causes, including sleep disruption, diet, and psychological stress, none of which were controlled for here.
• Self-experimentation with stacked peptides without medical supervision limits your ability to identify what actually caused an adverse effect.
• If you experience anhedonia, emotional blunting, or loss of libido while using any unregulated compound, stopping the compound and speaking with a physician is the appropriate step, not waiting for a "calibration" period that has no clinical evidence behind it.

The responsible framing this video almost gets right

The creator ends with a genuine public health message: "if you're not in a good state of mind and things are already looking bleak, some peptides are not for you." That's accurate, and it's rare to hear in peptide content that usually skews toward optimization hype. The problem is this warning comes after seven minutes of detailed protocol discussion and confident mechanistic claims that most viewers will remember longer than the disclaimer. The order of information matters. A warning buried at the end of a personal testimonial doesn't undo the implicit endorsement of the protocol itself.