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You might be well versed in the nutritional benefits of eating healthy fats, such as those found in nuts and olive oil, yet, where your skincare is concerned, fats (aka ceramides) hardly get a look in. Research by market analysts Mintel found that while many beauty fans have heard of ceramides, only 7% of you actually know what they are. Ignoring them in favour of trendier ingredients, such as retinol, acids or niacinamide, does a huge disservice to your dermis because ceramides hold the power to rejuvenate your skin. Here, cosmetic doctor and founder of Zenii skincare, Dr Johanna Ward, reveals all you need to know about the beauty of these wonder ingredients.