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Where It’s Hiding

What's the deal with titanium dioxide?

There are two primary forms of titanium dioxide commercially available: anatase and rutile. The rutile form is typically used in sunscreens due to its superior ability to handle UV rays and stability in the presence of UV light. The anatase form is typically used in other types of products, such as paint. Another plus of the rutile form is that its UVA protection extends past 400 nanometers, which is the upper limit of UVA.

When E171 is part of a food product, it passes through the digestive system without causing harm because E171 combines with the other ingredients.