Obviously if you feel differently, talk with your doctor. I am not a doctor, and this is not medical advice. I thought that went without saying on the internet, but just to be extra careful, there it is.
Couple of caveats in the almost. Pregnancy, Eating Disorders, Elite Athletes functioning at under 5% bodyfat, and again the key word being _healthy_ here. If you have any kind of condition, disorder, disease, etc. obviously talk to a medical professional.
Most people just don't have the desire to do it, and if you're not used to fasting and eating a standard diet, the first few days will make you feel terrible both physically and mentally. Just like anything, it gets easier with practice.
