The Only Peptide that Builds Collagen, Muscle, and Hair (longevity peptide)

DeLauer passionately endorses LMNT, describing its flavors (grapefruit, citrus, chocolate) and its ability to replace high-calorie drinks. He notes that the chocolate flavor can be mixed with hot water for a hot chocolate experience, complete with zero/very low calories. He positions it as a tool that not only hydrates but also satisfies, helping him avoid snacking. He emphasizes that it does not break a fast and keeps him energized. His personal use is sipping throughout the day, and he feels it's a key strategy for adhering to a fasting protocol.

Thomas DeLauer opens by acknowledging that peptides are little discussed by doctors and that human studies are almost nonexistent. He positions GHK-Cu as a naturally occurring tripeptide that binds copper, with levels dropping dramatically by age 60. He then walks through rodent and in vitro studies covering cognition, pulmonary fibrosis, acute lung injury, wound healing, collagen gene expression, angiogenesis, and hair follicle stem cells. The unifying theme is that GHK-Cu addresses root causes of aging: chronic oxidative stress, impaired tissue regeneration, and loss of stem cell function. He cautions that while the data is promising, it requires a 'grain of salt' due to the lack of human research, and emphasizes that he is not a doctor.

The study gave mice GHK-Cu for 5 days, then fully sleep-deprived them for the final 2 days. Mice without the peptide showed clear mental impairment, while the GHK group was nearly protected. DeLauer extrapolates that this could mean GHK-Cu helps fend off cognitive impairment as we age. Mechanistically, the researchers observed reduced inflammation in the hippocampus, explaining the memory preservation. Additionally, nitrotyrosine—a marker of oxidative stress that spikes during sleep deprivation—was 11–14% lower in the GHK group, indicating a dampening of brain stress signals. He presents this as both an acute cognitive rescue and a long-term neuroprotective strategy.

DeLauer recounts shaving his body for YouTube thumbnails while using GHK-Cu for shoulder and back injuries. Within a week, hair had grown to about half a centimeter, far exceeding normal rate, and he noticed ingrown hairs. Initially baffled, he researched and found a study where shaved mice receiving GHK-Cu developed thicker, faster-growing hair. An in vitro study on keratinocytes showed GHK increased cell replication at any dose. Mechanistically, GHK-Cu raised levels of integrin and p63—markers of stem cell formation—and the resulting follicles exhibited a healthy cuboidal shape. DeLauer frames this as GHK-Cu potentially counteracting the age-related loss of follicle stem cells, though he stresses more research is needed.

DeLauer discusses a study in the Journal of Aging Science where GHK-Cu increased collagen formation via upregulation of MMP1 and MMP2, genes associated with collagen synthesis. He emphasizes that collagen formation requires genetic direction; otherwise, it would 'just form wherever.' GHK-Cu not only increased collagen but also elastin, achieving the right balance of rigidity and flexibility. A separate cosmetic dermatology study showed topical GHK-Cu with hyaluronic acid boosted collagen types I, IV, and VII, which is relevant for skin youthfulness—explaining why skin loses structure and elasticity with age. He presents this as targeted activation, making it a promising cosmetic and anti-aging tool.