Dr Greger asks, "How many fewer calories do you have to eat every day to lose one pound of body fat?"

Calorie restriction means that we consciously consume a limited number of calories in a day. Is such a strategy helpful? Does it work in the long run? Or do people experience a yo-yo effect (sustainable for some duration but not forever)? Is it better to restrict calories derived from animal foods, and eat an unlimited quantity of unprocessed plant foods?

Is water-only fasting helpful for weight loss? Is it safe? What purpose does it serve?

A 3-video series on alternate-day intermittent fasting by Dr Greger from 2019.

Dr Greger comments on the efficacy of the Fasting Mimicking Diet (FMD) by Prof Walter Longo. He also covers the 5-2 Diet in which we eat for 5 days and fast for two days in a week.

Dr Greger explains that the idea of limiting our daily eating window to a short duration like 4 to 12 hours long is helpful. Front loading of calories is helpful — we should eat more calories during breakfast, fewer for lunch and fewer still for dinner. Eating at irregular hours is unhealthy.

A fascinating video series from 2020 by Dr Greger explaining the relationship between natural clocks, food intake and health.

Can fasting reverse the symptoms of autoimmune conditions and help us lower blood pressure? Dr Greger summarizes what is known as of 2020-2021.  

The Daniel Fast is a widely utilized fast based on the Biblical book of Daniel. It involves a 21 day ad libitum food intake period, devoid of animal products and preservatives, and inclusive of fruits, vegetables, whole grains, legumes, nuts, and seeds.

In 2022, Dr Greger published a 4-video series summarizing research into fasting and cancer.