18 Questions About The Sirtfood Diet: Lose Weight Like Adele

12. I am already slim – Is this diet still suitable for me?

he proper nutrition for the six-pack

We do not advise underweight people to follow phase 1 of the Sirtuin diet because it can negatively impact numerous aspects of health, such as a weakened immune system, increased risk of osteoporosis (bone loss), or fertility issues. 

If you are slim with a BMI in the healthy range of 20 to 25, you can start the diet. Keep in mind that the Sirtuin diet is about losing weight and improving health.