Fitness trainer Siddhartha Singh, who works with Tamannaah Bhatia, has ranked common protein sources. Greek yogurt received a perfect score for quality and availability, while whey protein was rated highly but advised as a supplement. Traditional Indian foods like dal, sattu, and peanut butter received lower scores due to factors like incomplete amino acid profiles or limited protein per serving. Singh's rankings aim to inform about protein intake and prioritize whole foods.