Arginine: A closer look at this amino acid widely used in cosmetology.

Arginine exhibits a range of skin and hair properties that make it an interesting ingredient for formulating cosmetic care products.

• Arginine promotes the proper functioning of the skin barrier.

  It appears that arginine may contribute to the maintenance of the skin barrier by increasing the production of collagen and elastin. In doing so, this amino acid could also enhance the suppleness and elasticity of the skin and slow down skin ageing. It should be noted that this effect of arginine is currently under study and has not yet been confirmed.

• Arginine acts as an antioxidant.

  Several studies have shown that oral intake of arginine can stimulate the production of glutathione, an antioxidant molecule present in the human body. By thus protecting the body and skin from oxidative stress, arginine prevents skin disorders caused by free radicals such as hyperpigmentation or skin sagging. However, these effects of arginine are only proven with oral intake, further studies are needed to demonstrate them following topical application.

• Arginine has healing properties.

  Arginine plays a significant role in wound healing, from the inflammatory phase through to skin remodelling. By contributing to the production of nitric oxide, it helps regulate the proliferation and differentiation of epithelial cells and modulate angiogenesis, the process of blood vessel formation.

• Arginine stimulates hair growth while reducing hair loss.

  The arginine is also used to formulate hair and eyelash products. Several studies have shown that it can act on the hair/follicle cycle to stimulate growth and prevent hair/eyelash loss. This amino acid works by protecting the fibres from the effects of dihydrotestosterone, a hormone that shortens their lifespan.

• Arginine has an alkalinising effect.

  Compatible with the majority of cosmetic ingredients, arginine has an alkaline pH, which means it can help balance the pH of formulations. It is important to control the pH of cosmetic care products so that they are compatible with the skin's natural acidity and do not disrupt the skin barrier.

To date, no side effects have been reported after using arginine for cosmetic purposes. This ingredient is considered safe and is not subject to a concentration limit by European cosmetic regulations, although it is generally incorporated into skincare products at concentrations between 0.5 and 5%. Furthermore, arginine is well tolerated by individuals with sensitive skin and its use is not restricted for pregnant or breastfeeding women and young children.

Note : we are only discussing here the topical use of arginine. The oral intake of arginine-based dietary supplements involves taking other precautions and we advise you to discuss with your doctor before starting a course.

For its strengthening and densifying properties, we have decided to incorporate arginine into our eyelash serum. This treatment also contains pea peptides, a sequence of amino acids known for their redensifying properties, and castor oil, a vegetable oil renowned for promoting hair and eyelash growth. These active ingredients work in synergy to nourish and enhance the resilience of the eyelashes.

Formulated from 95% natural origin ingredients, Typology's mascara serum provides a natural effect while promoting a gradual lengthening of the lashes. Its light texture and concentration in active ingredients allow it to stand out from traditional mascaras.