Roadmap: Basics

Intro

https://t.co/ — (@)	https://t.co/ — (@)

Core idea: boosting metabolism

Everything Ray recommended aimed to increase metabolic rate, the sum of bodily processes requiring energy.

A high metabolism means:

• More ATP (cellular energy)
• Higher body temperature
• Better tissue repair and regeneration
• Resistance to stress

Unlike machines, living organisms with abundant energy maintain and rebuild their structure. Energy and structure are interdependent.

"A living cell requires energy not only for all of its functions, but also for maintenance of its structure"

— Albert Szent-Györgyi

Ray sought a child-like metabolism: warm, active, stress-free, reparative, and curious. Health, in this frame, is not merely the absence of disease, but high energy production supporting physical, mental, and social well-being.

The thyroid gland conducts this via the hormones T3 and T4. Low metabolism (hypothyroidism) symptoms include cold extremities, low pulse, fatigue, depression, weight gain, poor sleep, and low libido. TSH tests are context-dependent, so using body signals instead (pulse, temperature, appetite, cravings) can be more useful.

Definition of metabolism: Metabolism is the sum of all cellular activity and energy production in the body. Stress and metabolism are inversely related:

• Increased stress lowers metabolic rate.
• Chronic stress signals the body to slow metabolism to conserve energy.

• Metabolism first paradigm: Ray's approach prioritizes metabolic rate as the foundation of health. Unlike popular diets like carnivore, keto, or veganism, which start with dietary ideology, This framework places the individual’s metabolic functioning first, considering factors such as pulse rate, body temperature, and overall cellular energy production.
• Problem with popular diets:
  • Carnivore diet: Based on ancestral eating patterns, it emphasizes diet first, then the person second.
  • Low carb: lack of nutrients for energy production
  • Veganism: Characterized as an “animals first” philosophy, often prioritizing ethical concerns over individual health outcomes.
    • Link to Vegetarianism
  • Neither diet accounts for personal metabolic history or genetic background, which are central to Ray's bioenergetic model.
• "Rate of living" theory rejected: A common objection to raising metabolic rate is that a faster-burning organism should age faster. Both Weissman's "wear-and-tear" theory and Pearl's "rate of living" theory have been refuted by metabolic studies showing that intensified respiration decreases cellular damage and supports a longer lifespan. Among a group of mice, the quarter with the most intense metabolism used more oxygen at rest and lived about a third longer than the quarter with the least.
  • "The candle that burns twice as bright burns twice as long"

Core terminology

Brief definitions. These concepts appear throughout the roadmap.

Energy production

Term	Definition
ATP	The energy currency of cells. High ATP = cell maintains structure and function.
Oxidative metabolism	Burning glucose with oxygen → CO₂ + high ATP. The efficient pathway.
Glycolysis	Burning glucose without full oxygen use → lactic acid + low ATP. The stress pathway.
CO₂ (Carbon Dioxide)	Not just waste. Promotes oxygen delivery, inhibits lactic acid, stabilizes cells.
Lactic acid	Metabolic waste that signals and amplifies stress/inflammation. Opposite of CO₂.

Pathway sketch (not a supplement map): glucose/fructose → glycolysis → pyruvate → PDH gate → Krebs cycle → electron transport → ATP + protective CO2. Common brakes: PUFA/free fatty acids (Randle cycle), low thyroid, stress hormones, endotoxin, estrogen on mitochondria. See Metabolism, Mitochondria.

Key hormones

Term	Role
Thyroid (T3/T4)	Master regulator of oxygen use and metabolic rate.
Cortisol	Emergency stress hormone. Converts tissue to sugar. Short-term useful, long-term destructive.
Progesterone	Protective hormone. Opposes cortisol, estrogen, inflammation.
Estrogen	Elevated in stress. Shifts cells toward inefficient energy production.
Serotonin	Stress/inflammation mediator (not "the happy hormone"). 95% made in gut.
Dopamine	Serotonin's functional opposite. High serotonin/low dopamine produces behavioral inhibition and harm avoidance; low serotonin/high dopamine produces "novelty seeking."
Prolactin	Rises with stress and estrogen; suppresses progesterone and reproductive/thyroid function.
Melatonin	Darkness hormone; chronically elevated by poor light exposure, associated with lowered metabolic rate.
Growth hormone	A stress hormone in Peat's framing, elevated by low blood sugar and fasting rather than a purely anabolic signal.

Harmful substances

Term	Why It Matters
PUFA	Polyunsaturated fats (seed oils, fish oil). Suppress thyroid, promote inflammation, accumulate in tissues.
Endotoxin (LPS)	Bacterial toxin from gut. Drives systemic inflammation when intestinal barrier fails.
Nitric oxide	Produced by estrogenic stimulation; interferes with energy production similarly to estrogen when prolonged.
Histamine	Inflammatory mediator, often elevated alongside endotoxin and allergic/gut reactivity.

Protective substances

Term	Why It Matters
Saturated fat	Stable fats (butter, coconut oil). Support thyroid, don't oxidize.
Pregnenolone	"Mother hormone." Precursor to progesterone, DHEA, and other protective steroids.

Full list in Terminology

Practical ways to increase metabolic rate

• Stimulating lifestyle: Engaging in novel and meaningful activities is vital, as well as avoiding unhealthy environments, relationships, and jobs.
• Environmental and nutritional factors:
  • Exposure to sunlight and red light
  • Adequate intake of sugar and calcium
  • Consumption of gelatin, salt, and thyroid hormone (when appropriate)
  • Maintaining regular bowel movements
  • Use of progesterone
  • Reduction of EMF exposure
  • Moderate caffeine and vitamin D supplementation
  • Occasional adventure and altitude exposure
  • Concentric exercise.

Recommendations on learning Ray Peat’s work

• Primary sources: Ray Peat’s original materials will always be more accurate than secondary sources such as forums or groups, which may contain misquotes or incomplete interpretations.
  • Articles: raypeat.com/articles
  • Audio interviews: Search "Ray Peat interview" (the 1996 Gary Null interviews are excellent introductions) bioenergetic.live and raypeat.rodeo
  • Books: Generative Energy, From PMS to Menopause
  • Newsletters: Available through Chadnet
  • Why, not just what: see Ray Peat's philosophy for the holistic framework (energy and structure, Vernadsky, self-ordering cells) underlying the practical advice in this Roadmap.
• Secondary resources
  • Tools and Resources
  • Generative Energy podcast by Danny Roddy
• Experimental verification and personal intuition
  • "The true method of knowledge is experiment." - William Blake
  • "Great discoveries are not made by committees or groups of workers; they originate in the minds of single individuals... I know of no important discovery in medicine or biology in the last hundred years that evolved out of gang research." - Tom Rivers

The two metabolic states

Healthy state (oxidative)

Glucose + Oxygen → CO₂ + Water + High ATP

• High body temperature (98.0°F+ by midday)
• Resting pulse 75-90 bpm
• Warm hands and feet
• Stable mood and energy
• Good sleep, wake refreshed

Carbon dioxide made in the cells releases oxygen from hemoglobin into the tissues (the Haldane-Bohr effect), relaxes blood vessels, and raises the efficiency of oxidative metabolism.

Stressed state (glycolytic)

Glucose → Lactic Acid + Low ATP

• Low body temperature
• Cold extremities
• Fatigue, brain fog
• Reliance on adrenaline/cortisol to function
• Poor sleep, wake unrested

Cells that keep making lactic acid even with enough oxygen show aerobic glycolysis, a respiratory defect that Otto Warburg measured in tumors.

"When we produce more carbon dioxide, that means we inhibit the production of lactic acid, which is not only a wasteful way to use sugar, but lactic acid has a signal function that turns on a whole range of inflammatory processes."

— Ray Peat

Signs of low metabolism

Common indicators of hypothyroidism or suppressed metabolic function:

Physical

• Cold hands/feet
• Low body temperature (below 97.8°F waking, below 98.6°F midday)
• Low resting pulse (below 75 bpm)
• Constipation
• Dry skin, hair loss
• Weight gain or inability to lose weight
• Fluid retention, puffiness

Mental/Emotional

• Fatigue, especially afternoon
• Depression, low motivation
• Brain fog, poor memory
• Anxiety (often adrenaline compensation)
• Low libido

Other

• High cholesterol (thyroid hormone and vitamin A are needed to turn it into pregnenolone); in the 1930s a rise in cholesterol was a standard sign of hypothyroidism
• Slow wound healing
• Frequent illness
• Poor exercise recovery

Cold hands, feet and nose point to adrenaline, and with low thyroid function that stress state runs almost all day.

More in Self diagnosis & markers

The stress cascade

Understanding how stress suppresses metabolism. This general shock → adaptation → exhaustion pattern was described by Hans Selye as the General Adaptation Syndrome; Selye considered estrogen's effects equivalent to the shock phase of stress.

1. Blood sugar drops OR stress occurs
2. Adrenaline and cortisol rise
3. Cortisol converts tissue (muscle, skin, thymus) to sugar
4. Free fatty acids (especially stored PUFA) release into blood, directly suppressing glucose oxidation (the Randle cycle), independent of PUFA's slower effect on thyroid function
5. PUFA blocks thyroid function at the cellular level
6. Metabolism drops → more stress hormones needed
7. Cycle reinforces itself

"With increasing age or malnutrition, anything that interferes with the production of protective steroids makes you shift over to the emergency production of cortisol."

— Ray Peat

Later sections cover dietary and lifestyle ways to break this cycle.

Environment and learned helplessness

The stress cascade isn't purely biochemical; environment shapes how it plays out. Genetically identical animals raised in enriched, varied environments develop differently from those raised in isolation, showing greater exploratory behavior and stress resilience. Conversely, an animal repeatedly unable to escape a stressor often stops trying to escape even when escape becomes possible again, a phenomenon called "learned helplessness." Enrichment and deprivation have opposite, measurable biological effects on stress resistance, not just behavior.

Allopathic vs orthomolecular medicine

Orthomolecular medicine uses substances naturally present in the body (vitamins, hormones, minerals) to restore health. The goal is to correct deficiencies and achieve a natural state.

Allopathic medicine relies primarily on synthetic pharmaceuticals.

"Orthomolecular medicine is the preservation of health and the treatment of disease by the provision of the optimum molecular constitution of the body, especially the optimum concentration of substances that are normally present in the human body and are required for life."

— Linus Pauling

Example

Orthomolecular - Progesterone, thyroid glandular, vitamins, minerals, diet as a key component

Allopathic - Synthetic progestins, Synthroid (T4 only), pharmaceutical drugs

A veterinarian is more likely to ask about your dog's diet, than a doctor about yours.

The need for all of this

The temperature decline

Studies show average human body temperature has dropped over the past century. Mainstream medicine now suggests 97.8°F (36.5 °C) is "the new normal," attributing this to "reduced inflammation." The temperature of men born in the 2000s is 1.06°F lower than men born in the early 1800s (about 0.05°F lower per decade). For women the drop is smaller, about 0.58°F. Over the last 50 years the national average has fallen about a degree for men, and postmenopausal women have dropped about as much as men.

This explanation contradicts the reality: obesity, diabetes, and metabolic disease are at all-time highs. The more likely explanation is population-wide decline in metabolic function.

Dietary thyroid was removed by regulation

Until 1940, Americans consumed thyroid hormone as part of their normal diet:

If you lived in a non-industrial culture, they would not have to remove the thyroid when they sell a chicken or a fish, and they would throw the beef and pork thyroid glands into a sausage mixture, and so you would get dietary thyroid if you were eating the way people did even in America until 1940, when the FDA came in, Agriculture Department, banned the sale of thyroid in food.

— Ray Peat

This dietary thyroid provided roughly half a grain of glandular extract daily, simply from eating animal foods normally. Shellfish, milk, and organ meats all contributed.

Historical thyroid dosing

Before synthetic T4 (Synthroid) dominated the market, physicians routinely prescribed 2-4 grains of desiccated thyroid based on symptoms and basal metabolic rate, not blood tests.

Two grains (about 120 mg) of desiccated thyroid was the average dose for decades. A healthy young gland produces the equivalent of about four grains a day.

Until the Second World War, hypothyroidism was diagnosed from the basal metabolic rate and a broad set of signs and symptoms. In the late 1940s the protein-bound iodine blood test took over, and the share of people counted as hypothyroid fell to about 5%.

The shift to synthetic T4-only therapy, guided by TSH testing (which appeared alongside Synthroid's market launch), represents a move away from the orthomolecular approach toward pharmaceutical standardization.

Timetable

Phase	Goals		Actions				Tools
Week 0	Familiarize yourself with the metabolic theory of health.		Read through the Roadmap page to gain a basic understanding of what metabolism is and how different factors affect it.				Link to Terminology
Week 1	Get a thorough idea of where your health stands.		For seven days, track your current diet on Cronometer or Peaty app. Measure and record your waking and noontime temperature and pulse. Take note of GI symptoms and sleeping habits.				Cronometer app, Peaty app, digital thermometer, and pulse reader. Link to Tracking
Week 2	Slowly incorporate healthier food items.		Reduce PUFA intake by switching over to using butter/coconut oil. Add dairy such as milk and cheese if tolerated. Add ripe fruit/juice, shellfish or lean seafood 1–2x/wk, beef or chicken liver 1x/wk. Check for food intolerance/allergies.				Recipeats.org, Diet, Food pyramid Grocery list
Week 3	Rhythm & Light: Focus on sleep quality and light exposure		Make sure to get enough sunlight especially right after waking up, sit under the chicken lamp when it is dark, remedy insomnia or interrupted sleep/waking up to pee.				Chicken lamp, night cap. Sleep guide
Week 4	Familiarize with supplements and get blood work done if desired.		Get basic labs, search through and read what effects different supplements and substances have, and incorporate as needed to increase the rate of metabolism.				List of blood tests, Online blood tests, Substances

Roadmap Navigation
	← Full Roadmap Overview	Next step → Roadmap/02 - Self diagnosis & markers