Protein sparing modified fast
The PSMF diet, explained plainly
A protein sparing modified fast is a very-low-calorie diet: under 800 calories a day, mostly lean protein, almost no carbs or added fat. Clinics use it for people with obesity who need to lose weight fast. It is meant to be done with a doctor.
Start here
- Guide
PSMF diet: what it is, how it works, and who should avoid it
The protein sparing modified fast in plain terms: the calorie, protein and carb numbers used in clinics, the two phases, side effects, and who should not try it.
- Calculator
PSMF protein calculator: how much protein do you need?
Work out your daily protein on a PSMF from your height, using ideal body weight and the 1.2 to 1.5 g/kg range from the Cleveland Clinic protocol.
- Calculator
Lean body mass calculator for PSMF
Estimate your lean body mass from height and weight with the Boer formula, or from a measured body fat percentage, and see how it compares with your PSMF protein target.
About this site
I'm Clint Tustison. I write these pages from published medical sources and list them at the end of each article. The calculators are free and run in your browser. More about the site.