Hormones Matter

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Hormones Matter

Derrick Lonsdale MD, FACN, CNS

Derrick Lonsdale M.D., is a Fellow of the American College of Nutrition (FACN), Fellow of the American College for Advancement in Medicine (FACAM). Though now retired, Dr. Lonsdale was a practitioner in pediatrics at the Cleveland Clinic for 20 years and was Head of the Section of Biochemical Genetics at the Clinic. In 1982, Lonsdale joined the Preventive Medicine Group to specialize in nutrient-based therapy. Dr. Lonsdale has written over 100 published papers and the conclusions support the idea that healing comes from the body itself rather than from external medical interventions.

More thoughts on thiamine deficiency

More Thoughts on Thiamine Deficiency

by Derrick Lonsdale MD, FACN, CNS
April 23, 2026
30K views

Thiamine Dependency and Intermittent AtaxiaReaders of this blog will recognize that there are many posts concerned with thiamine deficiency and that is

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Psychosomatic disease

Psychosomatic Disease: We Have It All Wrong

by Derrick Lonsdale MD, FACN, CNS
April 15, 2026
12.2K views

Psychosomatic disease (psyche: the mind, soma: the body). Illness is defined as “of, or relating to, the interaction of mind and body”.

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sleep requires energy

Sleep Requires Energy

by Derrick Lonsdale MD, FACN, CNS
March 17, 2026
31.2K views

It is widely believed that almost no calories are used during sleep. That is incorrect: while the body rests during sleep and

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medical revolution

Energy Loss as a Cause of Disease

by Derrick Lonsdale MD, FACN, CNS
March 4, 2026
19.6K views

I graduated from London University in 1948 and retired at the age of 88 years in 2012, so I have seen some

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lupron mitochondrial collapse

Post Lupron Mitochondrial Collapse: A Case Story

by Derrick Lonsdale MD, FACN, CNS
February 17, 2026
10.6K views

Dr. Marrs and I became aware of the symptoms and some of the laboratory results in a 38 year old woman. We

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Microbiome gut bacteria

Thiamine and the Microbiome

by Derrick Lonsdale MD, FACN, CNS
February 11, 2026
19.9K views

What is a Microbiome?Many people still refer to bacterial microorganisms as “germs”. Most are completely convinced that “germs” are the inevitable cause

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refeeding syndrome

Refeeding Syndrome

by Derrick Lonsdale MD, FACN, CNS
January 27, 2026
54.2K views

When people have had a prolonged deficiency in energy metabolism, sometimes for years, their symptoms are frequently not recognized for what they

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proteins, protein folding and enzymes

Protein, Protein Folding, and Enzyme Activity

by Derrick Lonsdale MD, FACN, CNS
December 23, 2025
12.9K views

As everybody knows, organic food consists of proteins, fats and carbohydrates. In this post I am going to indicate how protein is

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