Article last updated: October 15, 2024
Magnesium oxide, often referred to by its chemical identifier CI 77711, is a naturally occurring mineral derived from magnesite and dolomite. Chemically, it is composed of one magnesium atom bonded to one oxygen atom, forming a white, powdery substance that is highly stable. This compound has been utilized for centuries, initially finding its place in medicinal and industrial applications before making its way into the world of cosmetics.
The history of magnesium oxide in cosmetics is relatively recent compared to its other uses. It gained popularity due to its multifunctional properties, which make it a valuable addition to various beauty and skincare products. The process of making magnesium oxide involves heating magnesium carbonate or magnesium hydroxide at high temperatures, a method known as calcination. This process results in a fine, white powder that is easy to incorporate into cosmetic formulations.
Magnesium oxide’s journey from a raw mineral to a refined cosmetic ingredient showcases its versatility and effectiveness, making it a staple in many beauty products today.
In this section, we will delve into the officially recognized cosmetic benefits and uses of Magnesium Oxide:
Magnesium Oxide is an excellent absorbent. This means it can soak up excess oils and moisture from the skin, making it a popular ingredient in products designed for oily or acne-prone skin. By absorbing excess sebum, it helps to keep the skin looking matte and less shiny, which can be particularly beneficial in hot and humid climates.
As a buffering agent, Magnesium Oxide helps to maintain the pH balance of cosmetic products. This is crucial because the pH level can affect the stability and performance of the product. By keeping the pH in check, Magnesium Oxide ensures that the product remains effective and gentle on the skin, reducing the likelihood of irritation.
Magnesium Oxide also serves as an opacifying agent, which means it can make products more opaque. This is particularly useful in makeup products like foundations and concealers, where a more opaque finish is desired to provide better coverage. It helps to mask blemishes and imperfections, giving the skin a smoother and more even appearance.
Note: the listed benefits above are exclusively based on the officially recognized and defined functions of the ingredient, as documented by the International Nomenclature of Cosmetic Ingredients (INCI).
Magnesium oxide is generally considered safe for topical use in cosmetic products. It is known for its absorbent, buffering, and opacifying properties, making it a versatile ingredient in various formulations. However, like any cosmetic ingredient, it is essential to be aware of potential side effects and other considerations.
Regarding individuals who are pregnant or breastfeeding, data and research on the topical usage of magnesium oxide during pregnancy are lacking. Therefore, it is advisable for pregnant or breastfeeding women to consult a healthcare professional for further advice before using products containing this ingredient.
Adverse reactions to magnesium oxide are relatively uncommon. However, as with any new skincare product, it is recommended to conduct a patch test before widespread usage to ensure there are no adverse reactions.
Magnesium oxide has a comedogenic rating of 1, meaning it is very unlikely to clog pores. This makes it a suitable option for individuals prone to acne, blemishes, or breakouts. However, individual reactions can vary, so monitoring your skin’s response is always a good practice.
