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Think you can't overdose on face cream? Or the more vitamins and minerals you take the better? Think again. As our beauty routines get more complicated, we need to be wary of inadvertently overdosing on ingredients, or mixing and matching products with potentially dangerous results. He warns this can cause skin damage, interfere with medical tests, and possibly lead to serious health problems.

Read on to find out more...



Be biotin aware Biotin, or B7, is a very popular vitamin widely used in supplements for hair, skin and nails. It's water-soluble, which means it doesn't build up in the body and you don't need huge amounts. 'Biotin is only useful as a supplement if you have a deficiency,' says nutritionist Emma Bardwell, who warns excess use can come with dangers, including interfering with both thyroid and heart tests.

Last year, the British Generic Manufacturers Association wrote to healthcare professionals warning that biotin can affect thyroid function results, and patients should be asked about biotin or skin, nail and hair supplement use before testing. Shockingly, biotin can also interfere with heart test results. In 2019, the FDA reminded that high doses of biotin can significantly interfere with tests used to measure troponin, a protein in heart muscle that's released into the bloodstream during a heart attack, with concerns about both false high or low results depending on the test.

'If you go to hospital with chest pain your troponin levels will be measured,' says .

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