It is unlikely to hurt is not evidence that it works. A well-tolerated ingredient with no proven hair-growth efficacy is exactly that: safe and unproven
Research Note: In a gene-array analysis of skin cells reviewed by Pickart and Margolina in the International Journal of Molecular Sciences (2018), GHK produced a change of 50% or greater in expression for 31.2% of the human genes tested, with about 59% of those genes upregulated and 41% suppressed (Pickart & Margolina, 2018)
And yes, this alone may be what causes your leaky gut and your subsequent Ulcerative colitis
So the whole protocol ends up being an hour long
"But the truth is, this is an area of the market where unfortunately you might see a lot of overpromising and perhaps miss-selling." Dr Nilofer seconds this and adds: "There is a definite place for these non-prescription products as part of your hair loss treatment regimen, as long as you appreciate it is more of a support role." In other words, hair supplements alone won't solve the issue but might make a great addition to leave-in hair treatments, such as The Ordinary's