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nano gold cosmetics are formulated with various ingredients to promote the skin’s health and beauty. These products help restore the elasticity of the skin and make it glow.
They also strengthen the skin’s defense mechanism against ageing and environmental damage. They can deliver nutrients and oxygen deeper into the skin, giving the body the energy to function better.
These ingredients can provide whitening, anti-aging, emollient, and antioxidant properties to the skin. They can also promote the metabolism of fibroblasts and epidermal cells, accelerate the penetration of nutrients into the dermis, improve microcirculation, and activate cell vitality.
The use of these materials in cosmeceuticals requires extensive testing for safety, especially in the case of the active ingredients. The assessment should include the investigation of systemic exposure, local effects, routes of exposure (dermal, respiratory, or oral), and foreseeable uses of the product.
In addition, the absorption, distribution, metabolism, and excretion (ADME) profile of the active ingredient should be assessed. If systemic absorption is observed, further consideration should be given to the concentration to circumvent the associated toxicity.
Moreover, the EU guidelines require hazard identification/dose-response characterization and data from toxicological studies on local and systemic effects to be submitted half a year before market approval of nanocosmeceutical/nanoparticle-based items [111]. It also stipulates that information on undesirable effects, safety profile, and toxicity should be provided to the public at least half a year before the launch of these products.
Gold is a highly effective natural whitening agent, helping to reduce the appearance of wrinkles and fine lines. It also helps to stimulate collagen production and increase the elasticity of the skin.