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Does Sunscreen Make Foundation Oxidize?

2 Mins read

Sunscreen and foundation are two essential products in any makeup routine, but they can sometimes cause unexpected reactions when used together.

One question that many people have is whether sunscreen makes foundation oxidize.

In this blog post, we will explore what oxidation is, how it can affect your foundation, and whether sunscreen is the cause.

What is Oxidation?

Oxidation is a chemical reaction that occurs when a substance comes into contact with oxygen.

This reaction can cause a change in the color or texture of the substance. In the case of makeup, oxidation can cause foundation to darken or turn orange, making it difficult to match your skin tone.

Oxidation is a natural process that occurs over time, but it can also be accelerated by certain factors.

For example, exposure to heat or light can speed up the oxidation process, as can contact with certain substances.

Does Sunscreen Make Foundation Oxidize?

There is no scientific evidence to suggest that sunscreen alone causes foundation to oxidize.

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However, there are a few factors that may contribute to oxidation when sunscreen and foundation are used together.

1. Ingredient Interactions

Certain ingredients in sunscreen and foundation can interact with each other, leading to oxidation.

For example, some foundations contain ingredients like titanium dioxide and zinc oxide, which are also found in sunscreens. These ingredients can react with each other, causing the foundation to oxidize.

2. Sun Exposure

Sun exposure can also contribute to foundation oxidation. When you apply sunscreen and foundation, your skin is exposed to the sun’s UV rays.

These rays can cause the foundation to oxidize, especially if you are wearing a product with a high SPF.

3. Heat and Humidity

Heat and humidity can also accelerate the oxidation process.

If you are applying sunscreen and foundation in hot, humid conditions, it is more likely that the foundation will oxidize.

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How to Prevent Foundation Oxidation

There are a few steps you can take to prevent foundation oxidation when using sunscreen:

1. Choose a Foundation with a Neutral pH

Foundations with a neutral pH are less likely to oxidize than those with a high or low pH. Look for a foundation with a pH between 6 and 7.

2. Apply Sunscreen First

If you are using a sunscreen with ingredients that may interact with your foundation, it is best to apply the sunscreen first.

This will allow the sunscreen to fully absorb into your skin before you apply your foundation.

3. Use a Primer

A primer is a product that helps to smooth out your skin and create a barrier between your skin and your foundation.

Using a primer before applying your foundation can help to prevent oxidation.

4. Store Your Products Properly

Heat and light can cause foundation to oxidize, so it is important to store your products in a cool, dark place.

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Avoid leaving your foundation in a hot car or in direct sunlight, as this can cause it to oxidize more quickly.

5. Use a Setting Powder

A setting powder is a product that helps to set your foundation in place and prevent it from oxidizing.

Look for a setting powder that contains silica, as this ingredient is known to absorb oil and prevent oxidation.


Sunscreen does not cause foundation to oxidize, but certain factors, such as ingredient interactions, sun exposure, heat, and humidity can contribute to the oxidation process.

To prevent foundation oxidation when using sunscreen, choose a foundation with a neutral pH, apply sunscreen first, use a primer, store your products properly, and use a setting powder.

By taking these precautions, you can ensure that your foundation stays looking fresh and beautiful all day long.