2. Vitamin C

If you're craving citrus fruits, you could have a mild vitamin C deficiency. Vitamin C is an important nutrient that has a lot of benefits. It is one of the most important supplements for a healthy immune system, which prevents viruses and infections from attacking our bodies. This deficiency is quite rare and can cause skin problems, sore joints, and fatigue. Try eating strawberries, tomatoes, and oranges.

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