Nowadays, we use a variety of serums, acids, and creams to achieve glowing and flawless skin. Based on information found online, we often mix different active ingredients without considering how harmful their combination can be to our skin.

Using certain ingredients together can damage the skin barrier. Let's explore the ingredients that should not be used together.

Vitamin C and Retinol
Vitamin C and retinol are both considered superheroes in the skin care world, but applying them together is a big mistake. Vitamin C is good for protecting against the sun and giving a glow in the morning, while retinol is used at night to boost collagen. However, mixing them can lead to redness, burning, and dryness.

Retinol and AHA/BHA
AHAs, such as glycolic acid, and BHAs, such as salicylic acid, exfoliate the skin. Retinol also increases cell turnover. When you combine these two ingredients, the upper layer of skin can become too thin. This can lead to over-exfoliation, leading to peeling and increased sensitivity.

Vitamin C and AHA/BHA
Vitamin C is an unstable antioxidant. When combined with acidic AHAs or BHAs, it disrupts the pH balance of vitamin C. As a result, the vitamin C is neutralized, and you don't get any of its benefits. Furthermore, this combination can cause rashes and itching on sensitive skin.

Benzoyl Peroxide and Retinol
If you suffer from acne, you're likely familiar with these two names, but applying them together can be dangerous. They cancel each other out. Benzoyl peroxide oxidizes retinol, which can severely dry out the skin and worsen acne rather than alleviate it.

Using two different acids simultaneously
People often apply glycolic acid and salicylic acid at the same time to get quick results. This can completely disrupt your skin's pH level. This damages the skin barrier, allowing bacteria to enter the skin and increasing the risk of infection.

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