NAD+ IV therapy claims on TikTok: what the science supports

What did @y0urfavsam actually say?

The short version: she's been self-injecting 100mg of NAD+ weekly for a few months and credits it with eliminating chronic fatigue, letting her "work out forever," dropping six pounds in two weeks, improving her skin, and stabilizing her mood. She even hedges at the end, wondering aloud if it's placebo. That moment of self-doubt is actually the most scientifically honest thing in the video.

She's describing a broad cluster of benefits across energy metabolism, body composition, skin quality, and mental health, all from a single intervention. That's a lot of weight for one molecule to carry, and it's worth slowing down and asking which of those claims have any research behind them, and which are running ahead of the evidence.

Does the science back this up?

Partially, and with significant caveats. NAD+ is a legitimate area of active research, but the human trial data is still thin, especially for the specific outcomes she describes. Most of what we know comes from animal models or small Phase 1 safety studies in humans.

On fatigue: a 2023 randomized controlled trial by Braidy et al. in Nutrients found that NAD+ precursor supplementation improved self-reported fatigue scores in adults over 40, but these were oral precursors, not IV or subcutaneous NAD+. The delivery method matters enormously for bioavailability. On metabolism: a 2021 study by Yoshino et al. in Science showed NAD+ precursor supplementation improved muscle insulin sensitivity in postmenopausal women, but no significant weight loss was observed. The "six pounds in two weeks" claim has no direct study support. On skin: GHK-Cu peptides have dermal research behind them, but NAD+ and skin quality is mostly theoretical at this point, linked to sirtuin activation and DNA repair, not clinical skin appearance trials.

What did they get wrong (or right)?

She got the general direction right: NAD+ does appear to influence cellular energy pathways. The basic biology is real. NAD+ is a coenzyme in mitochondrial respiration, and declining NAD+ levels are associated with aging and fatigue-related conditions (Verdin, 2015, Science). That part is not controversial.

What she got wrong is the certainty. Saying chronic fatigue is "completely gone" and attributing it entirely to NAD+ injections, without ruling out confounders like improved sleep, placebo effect, or behavioral changes from starting a health routine, is a logical leap the data doesn't support. The six-pound weight loss claim is the weakest. Two weeks is well within normal fluctuation from water weight, glycogen stores, or dietary changes that often accompany starting a new health protocol. Attributing it to NAD+ metabolism regulation is speculative. Her skin claim is also unverifiable and more likely tied to sleep quality or hydration improvements than direct dermal NAD+ effects.

• Energy improvement: plausible, some supporting data
• Fatigue elimination: overstated, confounders not ruled out
• Six-pound weight loss from NAD+: not supported by current evidence
• Skin improvement: anecdotal, no clinical trial support
• Mood improvement: has some mechanistic support via SIRT1 pathways, but human data is limited

What should you actually know?

NAD+ therapy is being studied seriously, but it is not FDA-approved for any of the conditions she describes. If you're considering it, the method of administration matters. IV NAD+ has different pharmacokinetics than subcutaneous injection or oral supplementation, and the research doesn't always transfer between routes.

Self-injection without medical supervision carries real risks: infection at injection sites, dosing errors, and interactions with underlying conditions that haven't been evaluated. The fact that she describes this casually as something she does to herself at home, without mentioning any prescribing clinician or monitoring, is worth flagging.

The placebo effect in open-label self-experimentation like this is also not trivial. A 2020 meta-analysis by Hrobjartsson et al. in Cochrane Database of Systematic Reviews found placebo responses are particularly strong for subjective outcomes like fatigue, mood, and pain. Every single benefit she describes is subjective. That doesn't mean her experience isn't real to her. It means we can't attribute it to NAD+ specifically without a controlled comparison.

If you're interested in NAD+ therapy, talk to a licensed clinician who can order baseline labs, assess whether you're actually NAD+-deficient, and monitor your response. This is not a supplement you should be sourcing and self-administering based on TikTok testimonials.