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Allergy

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An allergy is an overreaction of the immune system to a foreign substance. The immune system normally protects the body from harmful substances, such as bacteria and viruses. However, in people with allergies, the immune system overreacts to a harmless substance, such...

Aloe vera

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Aloe vera is a succulent plant that is native to Africa. It has been used for centuries for its medicinal properties. Aloe vera is a rich source of vitamins, minerals, and antioxidants. It is also a natural humectant, which means that it can help to attract and retain...

Alpha hydroxy acids (AHAs)

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Alpha hydroxy acids (AHAs) are a group of naturally occurring acids that are found in fruits, milk, and sugar cane. AHAs are water-soluble, which means that they can penetrate the skin’s surface and exfoliate dead skin cells. AHAs are also humectants, which...

Alpha lipoic acid (ALA)

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Alpha lipoic acid (ALA) is a naturally occurring substance that is found in every cell in the body. It is a powerful antioxidant that can help to protect the cells from damage caused by free radicals. ALA is also a water-soluble and fat-soluble molecule, which means...