Is Titanium Dioxide Safe in Cosmetics?
As a widely used ingredient in cosmetics, the safety of titanium dioxide has always been the focus of attention of consumers and industry experts. This article will discuss the basic properties of titanium dioxide, its application in cosmetics, safety research, and consumer usage recommendations, providing you with a comprehensive perspective.
I.Introduction to the basic properties of titanium dioxide
Titanium dioxide is an inorganic compound with a high refractive index and good chemical stability. It is widely present in nature, usually in the form of minerals, such as rutile, brookite, sharp ore, etc., and has good affinity for human skin.
II.Application of titanium dioxide in cosmetics
Titanium dioxide is used as a sunscreen in cosmetics to absorb ultraviolet rays and prevent them from penetrating into the skin. However, when used in excess, titanium dioxide particles can clog pores, causing the stratum corneum to thicken, which in turn affects the skin's respiration and moisture balance, causing a series of skin problems. In addition, long-term and large-scale use of titanium dioxide may also cause allergic reactions such as contact dermatitis and urticaria. Therefore, in order to ensure skin health, it is recommended to use products containing titanium dioxide in moderation and pay attention to skin changes.
III.Scientific research on the safety of titanium dioxide
1.In 2006, the International Agency for Research on Cancer classified titanium dioxide (by inhalation) as a Class 2B carcinogen. The main ways of exposure to titanium dioxide for the population are inhalation, oral and skin exposure, among which oral exposure is the main exposure method in the food field. E171 is a mixture of micron particles and nanoparticles (NPs), containing up to 43% nano-titanium dioxide (nano-TiO2).
2.Nano-titanium dioxide can enter the blood circulation system orally and is widely involved in a variety of physiological metabolic processes, and its safety has received widespread attention. At present, most of the literature focuses on the toxicity research of industrial-grade titanium dioxide, and the risk assessment of food-grade titanium dioxide is still relatively lacking, so more related research is needed.
IV.Regulatory supervision of titanium dioxide
On June 22, 2022, the European Health and Food Safety Committee solicited opinions on the safety of titanium dioxide (TiO2) used in cosmetics. The main contents include:
1.TiO2 microcrystalline form is currently used as a white pigment or sunscreen in cosmetics, skin care, hair and oral products. Given that it is classified as a Category 2 carcinogen only through inhalation, the Scientific Committee on Consumer Safety (SCCS) has re-evaluated TiO2 and further restricted its use in cosmetics.
2.The European Commission requires SCCS to re-evaluate the safety of TiO2, focusing on genotoxicity and exposure through inhalation and oral routes (lip care, lipstick, toothpaste, loose powder, hair spray), because the currently available scientific evidence supports the overall lack of skin absorption rate of TiO2 particles.
V.Recommendations for consumers to use titanium dioxide
1.Consumers should choose professionally certified cosmetics to ensure product safety.
2.According to personal skin conditions and needs, use cosmetics containing titanium dioxide reasonably and avoid excessive use.
On the whole, the use of titanium dioxide in cosmetics is safe, and its safety is supported by scientific research and regulatory supervision. Consumers can use cosmetics containing titanium dioxide with more confidence on the basis of understanding its role and safety. As technology advances and regulations improve, we expect titanium dioxide to play a greater role in the cosmetics industry in the future while ensuring safety for consumers.
