Look for the freshest and best fruits and vegetables. Shopping in supermarkets requires care and attention. There is more to it than simply avoiding obvious meat, fish and eggs. Take the time to read every label. Keep in mind that nowadays virtually everything contains some product of animal origin, although this may not be so easy to ascertain.
Many products have it.
The same goes for products that are overly or exclusively coded with the infamous E-numbers. There are also a number of products with specific characteristics that make them unsuitable for offering. Mushrooms are unofferable and you will not find them in the Vedic kitchen. According to the Ayur Veda they increase the mode of ignorance. On top of that their nutritional value is practically zero.