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The Healing Power of Nourishment: Food as Medicine in Everyday Life
Let Food be thy medicine and Medicine be thy food. Food is more than fuel—it is biologically active. Learn how everyday foods reduce inflammation, support heart and brain health, and influence long-term wellness. This physician-guided overview explains how to use nutrition as a practical tool for disease prevention and improved vitality.

David S. Klein, MD FACA FACPM
Mar 294 min read


What Is an Antioxidant—and Why Are Antioxidants Important?
Antioxidants are essential biological protectors that help maintain cellular integrity by neutralizing harmful molecules known as free radicals. Free radicals are produced naturally during metabolism and play limited roles in immune defense and cell signaling. However, when their production exceeds the body’s protective capacity—a state known as oxidative stress—they can damage cell membranes, proteins, mitochondria, and DNA. Over time, this damage contributes to aging and ma

David S. Klein, MD FACA FACPM
Mar 246 min read


Iodine, Selenium, and Thyroid Function: Why Balance Matters
https://mayoclinic.elsevierpure.com/en/publications/selenium-and-graves-disease/

David Stephen Klein, MD FACA FACPM
Mar 215 min read


Selenium, Thyroid Autoimmunity, and Hypothyroidism. Why This Trace Mineral Matters for Thyroid Health
Selenium plays a crucial role in thyroid hormone metabolism and immune regulation. This trace mineral supports the conversion of T4 to active T3 and protects thyroid tissue from oxidative stress. In autoimmune thyroiditis, selenium may help reduce thyroid antibody levels and stabilize thyroid function. Learn where selenium occurs in food, the role of selenomethionine, and safe supplementation levels for thyroid support.

David Stephen Klein, MD FACA FACPM
Mar 195 min read


Magnesium Deficiency: The Most Common Mineral Deficiency. What Does it Do?
Magnesium deficiency is common and often missed. Low magnesium contributes to arrhythmias, insulin resistance, anxiety, and metabolic dysfunction—frequently despite “normal” serum labs. Learn how magnesium affects cardiac stability, insulin signaling, and neuroexcitation, and why correcting intracellular deficiency may improve cardiometabolic and neurologic health.

David Stephen Klein, MD FACA FACPM
Feb 204 min read


What is a Mineral, and Why is it Essential?
Minerals are essential inorganic elements that the human body cannot produce but requires for normal structure, metabolism, and physiologic regulation. They play critical roles in bone formation, nerve and muscle function, fluid and electrolyte balance, enzyme activation, hormone production, and oxygen transport. Minerals differ fundamentally from vitamins and hormones, yet deficiencies and imbalances remain common in modern societies due to processed diets, aging, medical co

David S. Klein, MD FACA FACPM
Jan 64 min read


THE HIDDEN CAUSES OF PERSISTENT FATIGUE: A PHYSICIAN’S GUIDE TO OVERLOOKED METABOLIC AND ENDOCRINE DISORDERS
Chronic fatigue often signals hidden metabolic or endocrine disorders. Learn the overlooked causes—from thyroid and iron issues to insulin resistance and mitochondria.

David S. Klein, MD FACA FACPM
Dec 24, 20254 min read


Insulin Level and the Risk of Cancer, Diabetes: Berberine may be the Answer by Lowering Insulin while Lowering Glucose.
Lowering insulin while lowering blood sugar is achievable with a thoughtful combination of over the counter products.

David S. Klein, MD FACA FACPM
Sep 9, 20254 min read


The Essential Nutrients: What Makes a Superior Multivitamin and Mineral Supplement?
Introducing an outstanding multivitamin and mineral product, offering a great value and spectacularly complete coverage. Down to Basics

David S. Klein, MD FACA FACPM
Mar 31, 20257 min read


Exploring the Diverse World of Magnesium Chelates and Products: Pros and Cons Unveiled. Choose Intelligently
Magnesium deficiency plagues 30% of the US population. We discuss the relative advantages and subtle differences between different products

David S. Klein, MD FACA FACPM
Mar 22, 202510 min read
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