Although oranges get most of the attention in the citrus family, they are hardly the only source of vitamin C. You may have been told to drink your orange juice every morning to help your immune system, but lemons are actually a better option. Lemons have just as much vitamin C as oranges and far less sugar. They also come loaded with B vitamins, calcium, magnesium and potassium.
This is not to say that oranges are not Paleo. They certainly are, but due to their high sugar content (not to mention the fact that most store-bought orange juice has sugar added to it) they are not ideal for those of us trying to cut back on sugar.
Lemons are an extremely versatile fruit that can be used in just about anything. Use the juice to make your own Paleo salad dressing, squeeze it over fish or chicken to add flavor, or you can start the day with lemon water.