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The cosmetics market lends itself to the EDXRF method since many additives in cosmetics are mineral or metallic in nature, or are organics with a heavier element attached that is measurable by EDXRF. Here are a few well-known applications:

Titanium and Zinc in Sunscreen
Titanium dioxide is used in most sunscreens to help prevent UV radiation burns. The concentration is high and easily measured by EDXRF. Zinc is also used in sunscreens as a UV blocking agent.

Iron, Titanium, and Zinc in Base Makeup
Flesh colored base makeup's usually contain black iron oxide, red iron oxide, and titanium dioxide and/or zinc oxide which are white. The ratio of these oxides determines the shade. EDXRF has been used to measure total iron, and other major components.

Toxic Metals in Cosmetics
Cosmetic component are usually analyzed for toxic components to ensure that they are safe. EDXRF analyzers can be used for measuring toxic metals such as lead, cadmium, mercury, and arsenic in cosmetic products.

Metal Dyes in Cosmetics
Some of the brightly colored dyes like those in eye shadows and fingernail polishes contain metallic dyes that can be measured by EDXRF.