2 doctors weighed in:

What are some 7 day crash diet negative side effects? I have a headache and this is my 2nd day on dr. Furhmans diet

2 doctors weighed in
Dr. Edward Smith
Neurology
1 doctor agrees

In brief: They don't work

They don't call them "crash" for nothing.
Your metabolism will crash as you drastically & abruptly alter your nutritional status, sometimes with the addition of drugs. I am unfamiliar with the specific diet you name, but any diet which involves depletion of nutrients (not just "empty" calories) will cause adverse effects--consider prisoner-of-war health issues arising from extreme "diets".

In brief: They don't work

They don't call them "crash" for nothing.
Your metabolism will crash as you drastically & abruptly alter your nutritional status, sometimes with the addition of drugs. I am unfamiliar with the specific diet you name, but any diet which involves depletion of nutrients (not just "empty" calories) will cause adverse effects--consider prisoner-of-war health issues arising from extreme "diets".
Dr. Edward Smith
Dr. Edward Smith
Thank
Get help from a real doctor now
Dr. Vikram Patel
Board Certified,
34 years in practice
974K people helped
Continue
111,000 doctors available
Read more answers from doctors