A vitamin B-3 or niacin deficiency may cause dry, cracked lips or tongue and a red, swollen mouth. It can also lead to chapped lips. You can get niacin in your diet by eating seafood, poultry, whole grains, dairy, green leafy vegetables, or taking supplements. #vitaminb3deficiency #chappedlips #chappedlipsremedy #niacindeficiency #vitaminb3sources #vitaminb3richfoods
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