Their Instagram posts are telling of the toil they put into their two-hours of physical training to stay in shape. But, what doesn't meet the eye is how unrelenting Bollywood's ace celebrities are during the remaining 22 hours, when monitoring what goes into their mouths. Ahead of World Health Day on Sunday, mid-day connects with celebrity nutritionists Dr Siddhant Bhargava and Maahek Nair to discuss four meal plans that are dominating the industry today.

Semi-Keto diet

What is it: An eating pattern that severely limits the consumption of carbohydrates in a bid to make fats the primary source of energy for the body.