Peptide therapy TikTok claims: separating hype from human data

What did @yesitsmeveronica actually say?

The creator says she lost significant hair during COVID and after weight loss, started something she calls "GHQ" (almost certainly GHK-Cu, a copper peptide), and is now seeing visible regrowth all over her scalp. She also says she's noticing fewer gray hairs, which she attributes to both NAD+ and GHK-Cu. Her words: "I am seeing less gray hairs, which is kind of crazy." She frames this as confirmation that the combination works, based entirely on her own visual observation.

To be clear about the substance: GHK-Cu is a naturally occurring copper-binding peptide. It's not a fringe compound. It appears in human plasma and has been studied for wound healing and skin biology. NAD+ precursors are a separate category entirely and she appears to be conflating two distinct mechanisms. The confidence here outpaces the evidence significantly.

Does the science back this up?

Partially, and with a lot of caveats. GHK-Cu does have real preclinical data supporting hair follicle activity, but the human trial evidence is thin and the gray hair reversal claim has almost no solid clinical backing.

A 2019 paper by Pickart and Margolina in Cosmetics summarized GHK-Cu's effects on hair follicles, noting it can stimulate follicle size and hair shaft diameter in tissue models. Separate work by Rushton (2002, Clinical and Experimental Dermatology) identified nutritional deficiencies, including those related to copper metabolism, as contributors to hair loss. So the biological plausibility exists for follicle-related effects.

On gray hair reversal: melanocyte function is complex. NAD+ precursors like NMN and NR have been studied for cellular energy metabolism, but no peer-reviewed clinical trial has demonstrated that NAD+ supplementation reverses graying in humans. A 2021 study by Covarrubias et al. in Nature Metabolism showed NAD+ metabolism influences cellular aging broadly, but graying specifically is not a validated endpoint. The claim here is a stretch.

What did they get wrong (or right)?

She got the hair regrowth plausibility partially right. COVID-related hair loss is typically telogen effluvium, a temporary shedding triggered by systemic stress. Telogen effluvium often resolves on its own within three to six months of the triggering event, regardless of intervention. Weight-loss-related shedding follows a similar pattern. Without a control condition, there is no way to know whether her regrowth is from GHK-Cu, natural recovery, improved nutrition, or time.

She got the gray hair claim wrong. Saying "I am seeing less gray hairs" and immediately crediting NAD+ and GHK-Cu is a post hoc attribution with no mechanism established in humans. Melanin production depends on melanocyte stem cell activity, oxidative stress, and follicle cycling. GHK-Cu has antioxidant properties in vitro, but that does not equal clinical gray reversal. This is the part of the video that crosses from anecdote into misinformation territory.

• COVID and weight-loss-related hair loss frequently resolves without treatment
• GHK-Cu has follicle-stimulating signals in preclinical models
• Gray hair reversal via peptides or NAD+ is not supported by clinical trials
• Her product names are unclear and she may be combining compounds without understanding their separate mechanisms

What should you actually know?

If you are considering GHK-Cu for hair loss, here is what the evidence actually supports: it has biological activity at follicle receptors, it has a reasonable safety profile in topical use, and there is early-stage human data suggesting possible benefit. That is meaningfully different from "it reversed my baldness."

For NAD+ and gray hair specifically: this claim should be treated with skepticism until a randomized controlled trial says otherwise. Correlation between starting a supplement regimen and noticing cosmetic changes is not causation. Hair also grows and changes in cycles that are influenced by stress reduction, diet changes, and dozens of other variables that shift when someone commits to a health routine.

Anyone seeing this video and interpreting it as clinical evidence is being done a disservice. The creator's experience may be real, but the explanation she offers is speculative. If hair regrowth matters to you medically, a dermatologist can assess whether your loss pattern is the kind that responds to follicle-targeted treatments, and which treatments have actual trial data behind them.