Peptide stacking claims on TikTok: what the evidence actually supports

What did @highriskchineseinvestor actually say?

The creator, referencing someone called Togi, pushed three compounds as the top peptides available: MOTSC (he calls it "MOTSIE"), NAD (nicotinamide adenine dinucleotide, technically not a peptide), and Semax (he says "Semex"). The pitch is direct: NAD "feels like you're kind of on an Adderall all the time without the negative side effects" and MOTSC prevents the cellular aging that supposedly makes steroid users look "wrinkly and disgusting." He frames these as broadly accessible, claims to have "done most of the peptides," and implies this stack is the obvious best choice for anyone interested in optimization.

For the record: NAD is a coenzyme, not a peptide. MOTSC (mitochondria-derived peptide MOTS-c) is a genuine peptide. Semax is a synthetic analog of ACTH. Lumping them together under "peptides" is loose, but the bigger issue is the specific claims made about each one.

Does the science back this up?

Partially, and in places where the science is genuinely interesting, the claims are still overclaimed. MOTS-c has real research behind it, but almost entirely in animal models. NAD precursors do have legitimate human data. Semax has some neurological research, mostly from Russian institutions.

MOTS-c was identified in 2015 by Lee et al. in Cell Metabolism as a mitochondria-derived peptide that appears to regulate metabolic homeostasis and insulin sensitivity in mice. Follow-up work, including Kim et al. (2021, Nature Communications), found MOTS-c influences exercise adaptation and may have anti-aging properties at the cellular level. That is genuinely interesting. But there are no large randomized controlled trials in humans confirming the anti-aging or "prevents early cell decay" effects described in this video.

For NAD, Yoshino et al. (2021, Science) published a randomized trial showing NMN supplementation improved muscle insulin sensitivity in postmenopausal women. That is real. But "feels like Adderall without side effects" is not a finding from any peer-reviewed paper. The energizing effect some users report is plausible through mitochondrial support, but it is anecdote, not evidence. Semax is even murkier for Western audiences since most human studies come from Russian clinical settings and are not replicated in large Western trials.

What did they get wrong (or right)?

They got the underlying interest in these compounds roughly right but the framing badly wrong on almost every specific claim. Calling NAD an Adderall substitute is the most irresponsible line in the video. Adderall is a Schedule II stimulant. NAD does not act on dopamine transporters or catecholamine release in the same way. Presenting it as a functional equivalent without side effects could push someone with ADHD to self-treat with an unregulated compound instead of seeking proper evaluation.

The MOTS-c claim that it counteracts the cosmetic aging effects of steroid use has no published evidence to support it. The cellular aging work in mice is about metabolic function, not skin appearance. Conflating the two is misleading to anyone listening who wants to use anabolic steroids and believes MOTS-c is a cosmetic fix.

What they got right: MOTS-c is a legitimate research compound with a plausible mechanism for cellular longevity. NAD precursor therapy has real human data for metabolic and possibly cognitive support. These are not made-up compounds. The enthusiasm is understandable. The specificity of the claims is where it falls apart.

What should you actually know?

These three compounds are at very different stages of evidence. NAD precursors (NMN, NR) have the most human data and are generally considered lower risk as oral supplements. MOTS-c is still largely a research peptide with no approved indication in any major regulatory market, meaning sourcing and quality are genuine concerns. Semax is unscheduled in the US but also unregulated, and most available research comes from Russian studies that have not been independently replicated.

None of these should be positioned as substitutes for prescription medications, evaluated treatments, or lifestyle changes. If someone wants to explore peptide therapy, that conversation belongs with a licensed provider who can assess labs, context, and risk. The FDA has issued warnings about compounded peptides including concerns over sterility and dosing accuracy. Self-sourcing based on a TikTok recommendation is a real safety issue, not a theoretical one.

• MOTS-c is not approved for human use by the FDA and has no Phase III trial data in humans.
• NAD infusions and oral precursors are different products with different evidence profiles.
• Semax is not a scheduled substance in the US but is also not FDA-approved and has limited Western trial data.
• Describing any compound as "Adderall without side effects" to a public audience is reckless framing.