Ray Peat on Weight Loss

Short answer: Ray Peat saw obesity as an energy deficiency, not an energy surplus. He wrote that cells that cannot burn sugar store fat, and that the answer is a higher metabolic rate through thyroid function, sugar instead of starch, and saturated instead of unsaturated fat.

What Ray Peat wrote about weight loss

He wrote that obesity, like diabetes, seems to involve a cellular energy deficiency: an inability to metabolize sugar. Source: Sugar issues

He blamed the rise in obesity on more fat and starch in the national diet, not more sugar, and found that consistent with the known effects of starch and polyunsaturated fat. Source: Sugar issues

Starch raises insulin and appetite. Sugar in place of starch reduces the tendency to store fat. Source: Glycemia, starch, and sugar in context

He cites the animal study in which Coca-Cola or sucrose allowed 50% more calories with no extra weight gain. Source: Glucose and sucrose for diabetes

Polyunsaturated fats suppress metabolism and promote obesity. Coconut oil does the reverse by supporting the thyroid. Source: Membranes, plasma membranes, and surfaces, Unsaturated Vegetable Oils: Toxic, Diabetes, scleroderma, oils and hormones

Estrogen is formed in fat cells under the influence of cortisol, so stress and body fat feed each other. Thyroid and progesterone suppress that. Source: Breast Cancer

At high altitude, he notes, people tend to eat more and stay leaner. Source: Fatigue, aging, and recuperation

Weight is not all fat. Fatigue, stress and estrogen make tissues swell with water. Source: Meat physiology, stress, and degenerative physiology

What he suggested in practice

• Raise the metabolic rate first: thyroid function, enough sugar, enough protein.
• Sugar and fruit in place of starch.
• Coconut oil and butter in place of seed oils.
• Milk and cheese for calcium.

Where he wrote about it

This topic comes up in 73 of the articles on his site. These are the most relevant ones:

• Sugar issues · original on raypeat.com ↗
• Diabetes, scleroderma, oils and hormones · original on raypeat.com ↗
• Unsaturated Vegetable Oils: Toxic · original on raypeat.com ↗
• Glycemia, starch, and sugar in context · original on raypeat.com ↗
• Eclampsia in the Real Organism: A Paradigm of General Distress Applicable in Infants, Adults, Etc · original on raypeat.com ↗
• Tryptophan, serotonin, and aging · original on raypeat.com ↗
• Meat physiology, stress, and degenerative physiology · original on raypeat.com ↗
• Suitable Fats, Unsuitable Fats: Issues in Nutrition · original on raypeat.com ↗

My take

You do not lose fat by starving your metabolism. Keep fat intake moderate, walk, get sun on your belly, keep estrogen low and fix your gut, because an inflamed gut is a bloated gut. The full approach is in How to lose fat and not muscle.

Quick answers

What did Ray Peat say about weight loss?

That obesity reflects a low metabolic rate and an inability to burn sugar, and that restoring thyroid function and replacing starch and unsaturated fat with sugar, fruit and saturated fat addresses the cause.

Did Ray Peat say sugar causes weight gain?

No. He wrote that sugar in place of starch reduces fat storage and cites an animal study in which sucrose allowed more calories without more weight gain.