The Sweet Science of Sugar in the Ray Peat Diet

We are continuing the theme from last week’s newsletter regarding Dr. Ray Peat and his philosophy around eating to increase your metabolic rate, optimize your hormones and increase your ATP (energy currency for the body)!

The reason I like talking about this pro-metabolic way of eating is I believe we have gotten into a mindset that if you just restrict whether it’s a macronutrient (carbs), calories, or fast you can become healthy.

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Now don’t get me wrong there can be a time to restrict certain foods (nightshades, grains, dairy) or fast especially if you are trying to heal your gut. But I think in the long term in order to optimize our health we should implement a variety of whole foods without restricting in order to be the best versions of ourselves!

Today we explore the surprising and often misunderstood role of sugar in the Ray Peat-inspired diet. Contrary to mainstream fear-mongering around sugar, Ray Peat’s work highlights its importance for energy metabolism, thyroid function, and stress resilience—when sourced and consumed wisely.

Why Sugar? The Metabolic Perspective

Ray Peat emphasized that the right kinds of sugar support mitochondrial energy production, reduce stress hormones (like cortisol), and help maintain optimal thyroid function. The key is choosing high-quality sources that minimize gut irritation and inflammation while providing quick energy.

Best Sugar Sources in a Peat-Inspired Diet

Not all sugars are created equal. Here are the top Ray Peat-approved sources:

1. Fruit (especially ripe, tropical fruits)

   • Orange juice, mangoes, bananas, and grapes provide fructose and glucose in a balanced ratio.

   • Fructose supports liver glycogen, while glucose fuels muscles and the brain.

   • Peat often recommended orange juice as a hydrating, energizing staple.

2. Honey (raw, minimally processed)

   • Contains antioxidants, enzymes, and trace minerals.

   • Supports digestion and provides a steady release of energy.

   • A spoonful before bed may improve sleep by stabilizing blood sugar.

3. White Sugar (in moderation)

   • While controversial, Peat argued that pure sucrose (table sugar) is less allergenic than high-fructose corn syrup or artificial sweeteners.

   • Small amounts can help combat stress by quickly raising blood sugar without spiking insulin excessively when paired with protein (e.g., milk + sugar).

How Sugar Fights Stress

• Lowers cortisol: Sugar helps suppress stress hormones by providing immediate fuel.

• Supports thyroid function: Low blood sugar triggers reverse T3 (inactive thyroid hormone), while adequate sugar promotes T3 (active thyroid hormone).

• Reduces lactic acid buildup: Proper glucose metabolism prevents fatigue and muscle cramps.

A Note on Balance

Peat never advocated for unlimited sugar consumption. The goal is to:

• Pair sugars with protein, calcium, and other nutrients (e.g., fruit with cheese, honey with milk). (I like honey with Greek yogurt 😀 )

• Avoid processed foods with industrial sweeteners (high-fructose corn syrup, agave).

• Listen to your body—some do better with more fruit, others tolerate honey or small amounts of white sugar well.

Try This: A Peat-Friendly Sweet Boost

☀️ Morning Energizer: Warm milk with honey and a pinch of salt.
 🍹 Afternoon Refresher: Fresh OJ with a sprinkle of salt (for electrolytes).
 🍌 Pre-Bed Snack: Ripe banana with cottage cheese.

Sugar, in the right form and context, is not the enemy—it’s a tool for vibrant energy and metabolic health. Give these tips a try, and observe how your body responds!

💬 Final Thought
"Sugar supports thyroid function, and the thyroid governs the metabolic rate. When sugar is lacking, the body turns to stress hormones like cortisol for energy, which slows metabolism." —Ray Peat

Have a great day!

Brian

P.S. Looking for one one one support with me to help lose inches, gain energy and build muscle? Book a FREE Health Breakthrough Call with me!