NAD+ IV therapy on TikTok: separating hype from human data

What did @winta_zesu actually say?

Not much, technically. The video shows her getting what appears to be a subcutaneous or intramuscular NAD+ injection for the first time, and she admits upfront that she doesn't really "need it" because she's "very youthful." She says she wants it as part of her routine and promises to report back on side effects and whether she feels "any more perfect." That's essentially the whole claim: NAD+ injections are something worth trying for general optimization, even if you're young and healthy.

To her credit, she doesn't promise a cure, doesn't cite fake research, and doesn't claim NAD+ will reverse aging overnight. She's honest that this is exploratory. But that vagueness cuts both ways: she's also not asking any hard questions about what she's actually putting in her body, who's administering it, or what the evidence actually looks like for her demographic.

Does the science back this up?

Partially, but the gaps are significant. NAD+ (nicotinamide adenine dinucleotide) is a real coenzyme with a real role in cellular energy metabolism, DNA repair, and circadian rhythm regulation. The problem is that most of the compelling human evidence comes from studies on older adults with metabolic dysfunction, not healthy young women.

A 2023 randomized controlled trial by Liao et al. in Nature Aging found that NMN supplementation (an NAD+ precursor, not NAD+ itself) improved muscle insulin sensitivity in older women with overweight. Martens et al. (2020, Cell Metabolism) showed NMN raised NAD+ levels in middle-aged and older adults. Neither study used injectable NAD+ directly, and neither enrolled the demographic @winta_zesu represents.

Injectable NAD+ does raise blood NAD+ levels faster than oral precursors, but there is no published clinical trial demonstrating that intramuscular or subcutaneous NAD+ injections produce measurable benefits in young, healthy individuals. The science is promising for aging populations. For a self-described youthful person with no apparent deficiency, the evidence is thin to nonexistent.

What did they get wrong (or right)?

She got the tone right: cautious, curious, not making wild claims. That's genuinely more responsible than a lot of wellness content on TikTok. She's not telling her 35,000 viewers that NAD+ will fix their mitochondria or reverse their biological clock.

What she got wrong, or at least skipped, is more structural. She doesn't mention that NAD+ injections can cause real side effects, including nausea, flushing, and injection-site reactions, which are especially common with faster delivery methods. She also doesn't acknowledge that injectable NAD+ is not FDA-approved as a drug, and that its availability through clinics operates in a regulatory gray zone.

The phrase "I don't really need it" is actually the most medically honest thing she says, and she treats it as a throwaway line. That framing deserves more weight. Using a compound with limited evidence in a healthy young person is not a neutral wellness choice. It's an off-label intervention with real unknowns. The science doesn't say it's dangerous. It also doesn't say it works for her.

What should you actually know?

NAD+ levels do decline with age, and that decline is associated with reduced mitochondrial function, increased oxidative stress, and impaired DNA repair (Verdin, 2015, Science). This is well-documented. What is not well-documented is whether artificially raising NAD+ levels in young people who haven't experienced that decline produces any clinical benefit.

Injection-based NAD+ delivery bypasses the gut and raises serum levels faster than oral NMN or NR (nicotinamide riboside). But faster is not the same as better. The body tightly regulates NAD+ metabolism, and there is legitimate scientific debate about whether flooding the system with exogenous NAD+ actually translates to better cellular outcomes, or whether it's just expensive urine.

Side effects worth knowing: flushing, chest tightness, nausea, and lightheadedness have all been reported with IV and high-dose NAD+ delivery (Grant et al., 2019, Journal of Alternative and Complementary Medicine). Subcutaneous and IM routes are generally better tolerated, but that data is mostly anecdotal from clinical practice, not controlled trials.

If you are considering NAD+ injections, that decision should happen through a licensed provider who can assess whether your NAD+ levels are actually low, what delivery method is appropriate, and whether the cost is justified by your individual health picture.