The ascorbic acid tends to reduce melanin pigmentation. So the patients are restricted to take  the citrus foods. Non vegetarian foods are also to be avoided as they act as a foreign body to pigment cells.  It is better to avoid even the milk and milk products.

Greens and Red Radish, Beetroots, Carrots and  Black dates may be taken. They could change the physiology and biochemistry of the skin with their natural pigments.