Amitsa, people who have chosen, for religious and/or ethical reasons, to adopt a vegan diet are at risk of being nutrient-deficient.

I suggest that you talk with what is called here an Accredited Practicing Dietitian (APD) - I don't know what the Indian equivalent is.

APDs are evidence-based health professionals who specialise in nutrition. An APD will be able to review what you eat with you and suggest ways in what you eat could be changed in a way which meets both your nutritional needs and your religious beliefs.