A study with healthy volunteers
For a more detailed research summary with study citations, see our GHK-Cu copper peptide guide, our collagen and skin regeneration research article, and our anti-ageing peptide research article
Clin Invest (1993) 71:3728
"My stock answer is that we just don't have enough data to support their use."
These include: Antioxidants (astaxanthin, alpha-lipoic acid, resveratrol, turmeric, pycnogenol) Beauty (retinol cream and hair, skin, and nails vitamins) Bone health (calcium, magnesium) Brain health (ginkgo biloba, Neuro-PS, acetyl l-carnitine) B vitamins (biotin, vitamin B-12, vitamin B complex) C vitamins Digestive health (probiotics, psyllium, digestive enzymes, milk thistle) D vitamins E vitamins Eye health (beta-carotene, bilberry, lutein) Heart health (omega-3 fish oil, coenzyme Q-10, flaxseed, ubiquinol, garlic, niacin, berberine) Immune health (echinacea, zinc, elderberry) Joint support (glucosamine, chondroitin, MSM, SAM-e, collagen) K vitamins Men's health (lycopene, saw palmetto) Sugar metabolism support (cinnamon) Multivitamins Sleep and relaxation (ashwagandha, melatonin, theanine) Women's health (black cohosh, cranberry) Innovative new products Each page of the vitamin guide features one product or ingredient and includes a summary of what it is, what it does, and how it can support the body
