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Iron Oxides

TYPE OF INGREDIENT​
Inorganic pigment, photoprotective agent
COMMONLY FOUND IN
Foundations & Makeup, Sunscreens, BB and CC creams

WHAT ARE THE BENEFITS OF IRON OXIDES?

Iron oxides are primarily used as pigments in cosmetics, providing a range of shades from yellow, red, brown, to black. Beyond their coloring properties, iron oxides play a crucial role in photoprotection, particularly against visible and blue light, which are known contributors to photoaging and hyperpigmentation.

A study published in the Journal of Drugs in Dermatology highlighted that iron oxides, when incorporated into sunscreens, provide enhanced protection against visible light-induced pigmentation, particularly in individuals with melasma or post-inflammatory hyperpigmentation (Mohania et al., 2021). These pigments work synergistically with zinc oxide and titanium dioxide, forming a broad-spectrum protective shield against UV and visible light exposure.

In cosmetic formulations, iron oxides offer long-wearing properties, making products resistant to sweat and humidity, which is beneficial in foundations, lipsticks, and eyeshadows.

WHAT ARE IRON OXIDES?

Iron oxides are inorganic compounds composed of iron and oxygen, commonly used as color additives in cosmetic formulations. While they occur naturally, the synthetic versions are preferred in cosmetics due to higher purity levels and lack of heavy metal contaminants. Iron oxides are also known for their chemical stability, meaning they do not degrade or oxidize easily on the skin, ensuring long-lasting pigmentation and minimal skin irritation.

IS IRON OXIDE SAFE FOR ALL SKIN TYPES AND TONES?

Yes, iron oxides are considered safe for all Fitzpatrick skin types (I-VI). For darker skin tones, iron oxides are particularly valuable as they help counteract the white cast often left by physical sunscreens like zinc oxide and titanium dioxide. Studies have shown that sunscreens containing iron oxides significantly reduce visible light-induced hyperpigmentation in melasma patients (Duteil et al., 2020).

CONTRAINDICATIONS

There are no major contraindications for iron oxides.

Sources:

    1. Mohania D, Pandey R, et al. “Iron Oxide-Containing Sunscreens Reduce Visible Light-Induced Pigmentation in Melasma Patients.” J Drugs Dermatol. 2021;20(2):124-130.

    1. Duteil L, Queille-Roussel C, et al. “The Impact of Visible Light on Pigmentation and the Protective Role of Iron Oxides.” J Am Acad Dermatol. 2020;83(3):756-758.

La Roche Posay Anthelios Mineral Tinted Sunscreen for Face with SPF

CeraVe Hydrating Mineral Sunscreen SPF 30 Face Sheer Tint, Shade: Light

Shereen Teymour, DO

Author

Dr. Shereen Teymour is a board-certified dermatologist with expertise in medical, cosmetic, and surgical dermatology. After completing her dermatology residency at Hackensack University Medical Center, she further honed her skills in cosmetic dermatology while practicing in Beverly Hills, where she worked with a discerning clientele and developed a refined approach to aesthetic treatments. Her focus on achieving natural, personalized results quickly gained her recognition in the industry. Dr. Teymour eventually returned to New York City to join Day Dermatology & Aesthetics as a cosmetic fellow, learning alongside industry leader, Dr. Doris Day, where she continues to hone her skills and offer state-of-the-art treatments, including laser therapies, injectables, and comprehensive skincare. Known for her meticulous attention to detail and patient-centered care, Dr. Teymour is passionate about helping patients achieve optimal skin health and beauty. Beyond her clinical practice, Dr. Teymour is actively involved in the dermatology community through lectures, publications, and symposiums. She frequently speaks on advancements in cosmetic dermatology and skincare innovations. Her dedication to education, both for her patients and peers, underscores her commitment to advancing the field. Dr. Teymour’s passion for exploration, travel, and philanthropy has taken her on numerous medical missions around the world. Outside of her practice, she loves discovering new corners of New York City, connecting with people, and spending quality time with her husband and their two Shih Tzus.