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Are You Cracking Up... Even if you think your diet is balanced, it’s easy to miss out on key nutrients. And sometimes those deficiencies show in your lips, says Cath Collins, dietician at St George’s Hospital in London. “If your lips suddenly become dry, or you develop painful cracks at the corners of your mouth, you could be running low on iron, zinc, vitamin B3, or vitamin B6,” Cath says. The solution may be as simple as adding a little red meat to your diet – it's a rich source of both iron and zinc. You can also find iron, zinc, and B vitamins... Read more