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The CRON Diet

browse diets: Diets / Low Calorie Diets / The CRON Diet

How does the CRON diet work? CRON stands for Calorie Restricion with Optimal Nutrition. The diet works on the scientific basis that the amount of calories being consumed must be less than the amount of calories being used in order to lose weight. This is accomplished by restricting the number of calories that are being consumed so that you lose weight at a rate of about 2% of your body weight each month until you reach your goal weight. The CRON diet does not want to deprive the body of the nutrients it needs during weight loss so they encourage dieters to eat foods that are calorie-poor and nutrient-rich. This is a very important part of reaching the goals of the CRON diet.

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If you answer yes to more than 50% of the following questions, the CRON Diet is right for you:

  • 1Do you want to change your current dieting lifestyle?
  • 2Do you want to retard the aging process and effects on your body?
  • 3Do you want to improve your health?
  • 4Do you have time to plan meals and keep a food diary?
  • 5Do you have the will power to stick to a restricted calorie diet plan?

The CRON Diet promise to you?

The CRON diet is all about increasing longevity and decreasing chronic health diseases. The CRON diet, developed by Dr. Roy Walford, Lisa Walford, and Bryan Delaney, suggests that eating the fewest calories possible, while still maintaining good nutrition, will lower the risks of heart disease, cancer, diabetes, and stroke. They also claim that this diet can slow down the aging process and boost the immune system. Knowing your current health, height, weight, diet, and other information is important to realizing the full benefits of the CRON diet. Walford's website offers a free diet analysis and food suggestions to help you get started on the program.

The Theory and Details Behind The CRON Diet

Diet & Nutrition

The CRON diet, also called the CR diet, Anti-Aging Diet, or Longevity Diet, stands for Calorie Restrict with Optimal Nutrition. Dr. Walford discovered many of the principles behind this diet during his work on Bioshpere 2 and through extensive animal testing. The theory behind the CRON diet is that each individual has a specific weight that provides them with the best health. This is the optimal or goal weight. The goal weight is determined by using the current weight and body fat content (which can be found using a Fat-O-Meter). Once the goal weight has been determined, you are directed to lose weight at a slow and steady pace, no more than 2% of your body weight a month. Weight loss is achieved by limiting your calories and making sure that the calories you eat give you the best nutrition possible.

The average individual is instructed to eat about 1800 calories a day, spread over three meals. However, it can be adapted to fit a lifestyle that requires more than three meals a day. Once a week, the CRON diet instructs dieters to make 8 meals and freeze them for use throughout the week. These meals have ingredients that are super-charged with nutrients. These meals are to be eaten, one a day. The other 2 courses of the day can be planned by the individual. They must be planned carefully and meet all the nutrition requirements of the Recommended Dietary Allowance (RDA). Dr. Walford's Interactive Diet Planner (available at and the Cron-O-Meter (available at are useful tools to help you plan meals and get the best nutrition recommendations.


The CRON diet does not have a specific exercise plan, but it does recommend a healthy amount of exercise every day to increase the health benefits of the diet.

What Health Care Professionals Say About The CRON Diet

Dr. Roy Walford, a prominent Gerontologist from UCLA, spent 2 years on the Bioshpere 2 project at the University of Arizona. He and several others were enclosed for 2 years in a controlled biodome habitat where they conducted various research and were fed a high-nutrient, low-calorie diet. While on the diet, Dr. Walford and the others lost considerable amounts of weight and experienced improved health signals. Dr. Walford spent several decades testing mice to learn the effects of this low-calorie, high-nutrient diet on their longevity and health. His testing showed that eating fewer calories that held high levels of nutrients extended the life of the mice. Not only did they live longer than those fed other diets, but they had significantly better health.

Similar studies done by Dr. Richard Weindruch, found that the life expectancy of mice was increased 34% when they were fed 50% less calories, but given the same amount of proteins, vitamins, and minerals. The occurrence of tumors in the mice was reduced by 40% in those fed a calorie restricted diet.

Similar studies have been done on adult monkeys. Results were similar to those of the mice.

Examples of The CRON Diet Meals: #1

BreakfastOmelet with green onions on multi-grain bread, low-fat milk & orange juice
LunchCottage cheese & yogurt mix with an apple and toasted english muffin
SnackNon-fat yogurt with nuts & figs
DinnerBaked Salmon on a bead of broccoli, tomatoes, & mushrooms

Examples of The CRON Diet Meals: #2

BreakfastPoached egg with 2 pieces of toast & 1 cup coffee
LunchFalafel patty sandwich & carrot sticks
DinnerRoasted chicken breast with a baked potato & steamed spinach
DessertOat bran muffin & dates

Beyond the 120 Year Diet: How to Double Your Vital Years

According to Dr. Roy Walford, there's no need for plastic surgery or obsessive exercising to escape the effects of time. He argues that longevity can be significantly increased by a diet that contains all the required nutrients but about a third fewer calories.

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