Zinc is present in more than thirty cosmetic ingredients, with varying degrees of controversy and diverse actions (antimicrobial, surfactant, foaming agent, pH regulator...). Its concentration is restricted in Europe according to the Cosmetic Regulation to 1% zinc in the final product.
What are the benefits of zinc for the skin?
When applied topically, zinc is a comprehensive anti-acne agent. This trace element possesses anti-inflammatory, antibacterial, and healing properties that are highly beneficial for acne. Indeed, it inhibits the growth of the Propionibacterium acnes, which is the bacteria primarily responsible for this skin condition. Furthermore, zinc reduces the activity of the sebaceous glands due to its anti-androgenic activity. Thus, it helps to regulate sebum production and consequently prevents blemishes.
What are the benefits of zinc for hair?
Essential for the "beauty" of hair, zinc contributes to the synthesis of keratin, the protein that makes up the hair fibre. Its ability to combat cellular ageing due to its antioxidant power mitigates the signs of ageing on the hair. These signs usually manifest as a loss of volume, unusual hair discolouration, and thinning. Zinc also has purifying and antibacterial properties. It helps to regulate sebum production and thus prevents the excesses that cause oily scalps and imbalances. It thus helps to limit the appearance of oily dandruff, and is therefore found in many hair care products targeting this issue.
For your information : it is primarily the zinc pyrithione (INCI: Zinc Pyrithione) that was found a few years ago in the main anti-dandruff hair treatments. However, this active ingredient is now highly controversial (suspected mutagen, potential reproductive toxicant, potential aquatic ecotoxicity) and above all banned in Europe (Annex II/1670 of the cosmetic regulation). Instead, zinc PCA or zinc gluconate are now used, which are much gentler and pose no risks to health and the environment.
What are the benefits of zinc for nails?
Zinc has the unique property of strengthening nails, as it aids in the synthesis of keratin, the primary protein that constitutes nails.Beyond strength and growth, zinc gives your nails a well-groomed appearance. A treatment containing a sufficient amount of zinc is applied directly to the nails. Circular massages help the treatment to penetrate. A course of a few weeks can restore a beautiful appearance to your nails.
It should be noted : due to its antimicrobial action, zinc-based ingredients are also found in toothpastes (anti-plaque properties), as well as in deodorants and antiperspirants.