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Someone trying to restore their hair wrote about the products they're using and asked if adding an oral supplement called KLOW would give them too much copper. They’re already using two copper-containing peptides (AHKCu and GHKCu) in a nightly topical solution, plus a weekly 1 mm roller and morning minoxidil. They also have KLOW 80, which they’d take as about 2 mg per day, and they’re worried about total copper exposure and safety. GHKCu and AHKCu are short chains of amino acids (peptides) that have a copper atom attached. In plain terms, they’re tiny protein fragments that bind copper and are sold in skin and hair products because early research suggests they can help with wound healing, skin quality, and possibly hair growth by affecting cells and signaling. The peptides are used on the scalp in a liquid form here. Minoxidil, which they’re also using, is a well-known topical treatment that can help hair regrowth by stimulating hair follicles; it works differently from these peptides. What the evidence actually shows is limited and mixed. Most of the supportive studies for GHKCu/AHKCu are small, early-stage lab experiments, animal studies, or small human trials focusing on skin healing and collagen, not large robust clinical trials proving hair regrowth. Users online report varied results, but that’s anecdote, not proof. KLOW appears to be a commercial peptide blend that contains GHKCu plus tiny amounts of other peptides like TB-500, BPC-157, and KPV; the numbers you listed (1.25 mg GHKCu and about 250 micrograms combined of the others) are fairly small doses typical of topical or sublingual niche supplements rather than prescription drugs. There’s no strong published evidence showing that stacking all these together is clearly more effective than one product alone. Why this matters for a regular person: if you’re trying to improve hair, you want to avoid wasting money and avoid potential harm. Combining multiple agents can sometimes boost benefits, but it can also increase cost and unknown risk without adding real benefit. People using minoxidil often add complementary products, but each new ingredient raises questions about interactions, irritation, and long-term safety. If you care about measurable results, the most reliable path is to stick with treatments that have stronger evidence and discuss additions with a dermatologist who knows your scalp and health history. Caveats and risks: topical copper peptides are generally considered low risk for most people, but they can cause local irritation, allergic reactions, or discoloration in some cases. Systemic toxicity from the tiny topical amounts is unlikely, but if you’re also taking oral supplements that add copper, total intake could become a concern—especially if you have a condition that affects copper handling (like Wilson’s disease) or if you’re pregnant. The other peptides mentioned (TB-500, BPC-157, KPV) are experimental; they are not FDA-approved for hair loss and their safety profiles in humans aren’t well-established. Needle-based delivery or high systemic doses are a different safety story than small topical use. Also, product purity and labeling can vary with supplements sold online, so what’s on the label isn’t always what’s in the bottle. Bottom line: Adding 2 mg of that KLOW blend on top of your topical GHKCu/AHKCu is unlikely to cause obvious copper poisoning for a healthy person, but the benefit is uncertain and the safety of combining several experimental peptides isn’t well studied. If you’re worried or have health conditions, get a quick consult with a dermatologist or a doctor before stacking more products.
Source: r/Peptides