800 Calorie

800 calories per day sits in very-low-calorie diet (VLCD) territory and should not be attempted without medical supervision. The 800-calorie range appears in a few evidence-based clinical protocols - Michael Mosley's Fast 800, some medically supervised weight-loss programs, and short-term pre-bariatric-surgery preparation - but even in those contexts, licensed clinicians monitor patients through the plan.

800 Calorie Vegetarian Diet Plan

800 Calorie Vegetarian Diet Plan

Many people worldwide struggle with weight. While some prefer to go under the knife to get the extra fat off, others starve themselves or go on diet plans to lose weight.

800 Calorie Keto Meal Plan

Easy 800 Calorie Keto Meal Plan

Many people today want to live healthy lives, and they will do anything to accomplish that.

pexels-nataliya-vaitkevich-6942171

800 Calorie Meal Plan for Type 2 Diabetics

Type 2 diabetes is a type of metabolic disorder that requires regular health check-ups and weight control to avoid complications like heart disease, kidney disease, and stroke.

800 Calorie Breakfast

Easy to Prepare 800 Calorie Breakfast

Breakfast is perhaps the most enjoyable meal of the day. Undoubtedly, many of us adore it because of its great food options and importance as the first meal of the day.

Other calorie levels

Calculate your daily target if you are not sure which level fits.

About this collection

800 calories per day sits in very-low-calorie diet (VLCD) territory and should not be attempted without medical supervision. The 800-calorie range appears in a few evidence-based clinical protocols - Michael Mosley's Fast 800, some medically supervised weight-loss programs, and short-term pre-bariatric-surgery preparation - but even in those contexts, licensed clinicians monitor patients through the plan. It is not a lifestyle diet.

Because daily energy needs for most adults sit between 1,600 and 2,400 calories, an 800-calorie intake produces a large deficit that drives fast weight loss in the first weeks - mostly water and glycogen, then fat, and if extended, muscle. Common risks include gallstones, electrolyte disturbance, hair loss, fatigue, dizziness, cold intolerance, and menstrual changes. Contraindications include pregnancy and breastfeeding, adolescence, eating-disorder history, type 1 diabetes, and any condition requiring steady caloric intake for medication management.

The plans in this tag are for reference, not blanket recommendation. If you are considering an 800-calorie plan, work with a licensed clinician who can order labs, monitor your response, and set a re-feed timeline. All content in this tag is medically reviewed by Franco Cuevas, MD. Our nutrition team, including Registered Dietitians Brenda Peralta, Kerly Cordova, and Marita Radloff, reviews the macronutrient split for every 800-calorie plan we publish.