Peptide stacking claims on TikTok: what the science says

What did @flexxystreamz actually say?

The creator claims they've been taking 5-amino-1MQ alongside NAD+ for about two and a half weeks and experienced high energy. Their core argument: 5-amino-1MQ blocks an enzyme called NMT (they mean NNMT, nicotinamide N-methyltransferase) that "inhibits NAD function levels from being higher." Block the enzyme, and you theoretically get more usable NAD+, plus fat oxidation benefits on top.

They also offered an explanation for why some people feel tired on NAD+: high NNMT activity is supposedly draining the benefit before it kicks in. The proposed fix is stacking both compounds. Their framing is casual and self-aware, noting "I may not be the best at explaining it," which is worth keeping in mind as we dig into the accuracy of the biochemistry.

Does the science back this up?

Partially, yes, but the mechanism is more complicated than the video suggests, and the human evidence is thin. NNMT is a real enzyme, and its role in NAD+ metabolism is a legitimate area of research. The problem is that most of what we know comes from animal models and cell studies, not clinical trials in humans.

NNMT methylates nicotinamide (a NAD+ precursor) to produce 1-methylnicotinamide, effectively diverting nicotinamide away from NAD+ synthesis. So inhibiting NNMT does, in theory, push more nicotinamide back toward NAD+ production. A 2021 paper by Gomes et al. in Nature Metabolism confirmed NNMT's role in regulating cellular NAD+ pools in mouse adipose tissue. A 2022 study by Hong et al. in the Journal of Medicinal Chemistry specifically examined 5-amino-1MQ as an NNMT inhibitor and showed reduced fat mass and improved metabolic markers in diet-induced obese mice. These are real findings. But mice are not people, and two and a half weeks of self-reported energy is not a controlled trial.

What did they get wrong (or right)?

They got the general concept right but fumbled the enzyme name, calling it "NMT" instead of NNMT. That matters because NMT (N-myristoyltransferase) is a completely different enzyme involved in protein modification. It's a small error but the kind that spreads misinformation when thousands of viewers write it down.

They also oversimplified the mechanism. NNMT doesn't simply "inhibit NAD function." It competes for the nicotinamide substrate. That's a meaningful distinction because NNMT inhibition isn't guaranteed to raise systemic NAD+ levels in every tissue or every person. NAD+ metabolism is tissue-specific and depends heavily on individual baseline levels, diet, age, and other variables.

The fat oxidation claim deserves scrutiny too. The Hong et al. 2022 mouse study did show fat mass reduction, but attributing that directly to "fat oxidation" as a simple mechanism is a stretch. The pathways involved include SIRT1 activation and epigenetic changes in adipocytes, not just metabolic rate increases. Saying you'll "get the energy benefits plus the fat oxidation" as a neat package is an oversimplification that could set unrealistic expectations.

Credit where it's due: suggesting that NNMT inhibition could explain why some people don't respond well to NAD+ supplementation is actually a plausible hypothesis. It's not proven in humans, but it's not invented either.

What should you actually know?

5-amino-1MQ is not an approved drug. It is not a regulated supplement. It exists in a research chemical grey zone, and the human pharmacokinetics data is essentially nonexistent in published literature as of 2024. You are, in practical terms, experimenting on yourself with a compound whose safety profile, bioavailability, and long-term effects in humans have not been established through peer-reviewed clinical trials.

NAD+ precursor supplementation (NMN, NR) has more human trial data, though even that evidence is still emerging. A 2023 randomized controlled trial by Yoshino et al. in Science showed NMN improved muscle insulin sensitivity in postmenopausal women, but the effects were modest and context-dependent.

The stack this creator describes has no published human safety data as a combination. If you're considering either compound, that conversation belongs with a licensed clinician who can review your bloodwork and health history, not a TikTok comment section. Anecdotal reports of feeling "fantastic" after two weeks tell us almost nothing about what's actually happening at the cellular level, or what might happen at week twelve.

The bottom line

The creator is engaging with real science, which is more than can be said for most peptide content on TikTok. The NNMT-NAD+ connection is biologically plausible and supported by preclinical research. But the human evidence for 5-amino-1MQ is essentially absent, the enzyme was misnamed, and the fat oxidation framing overpromises. Enthusiasm is not a substitute for clinical data.