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Extreme Heat, Heavy Sweating, and Salt Loss: When Water Is Not Enough
Extreme heat and prolonged sweating cause the body to lose more than water. Sodium losses during hiking, exercise, gardening, landscaping, and outdoor work can become substantial. Learn how much salt may be lost through sweat, when water alone is sufficient, when electrolyte replacement becomes important, why drinking too much plain water can also be dangerous, and which symptoms mean it is time to stop self-treatment and seek medical care.

David Stephen Klein, MD FACA FACPM
Aug 199 min read


The Longevity Pulse: What Your Resting Heart Rate Says About Your Health
Your resting heart rate is more than just a number—it is a powerful biomarker of cardiovascular fitness, autonomic nervous system balance, metabolic health, and healthy aging. Learn why "normal" may not always mean "optimal," what research reveals about heart rate and longevity, and how exercise, sleep, nutrition, stress management, and overall health influence your pulse. Discover practical strategies to improve cardiovascular efficiency and support a longer, healthier life.

David Stephen Klein, MD FACA FACPM
Aug 1010 min read


C15:0 (Pentadecanoic Acid): Could This Be the First Newly Recognized Essential Fatty Acid in Nearly 100 Years?
Could C15:0 (pentadecanoic acid) become the first newly recognized essential fatty acid in nearly a century? Emerging research suggests this naturally occurring odd-chain saturated fatty acid may support healthy cell membranes, mitochondrial function, metabolic health, and healthy aging. Learn what current science tells us about food sources, supplements, recommended intake, and why researchers are paying close attention to this unique nutrient.

David Stephen Klein, MD FACA FACPM
Aug 77 min read


Adrenal Dysfunction and Adrenal Fatigue: Vital to Life, Yet Often Overlooked in Modern Medicine
The adrenal glands are among the body’s most vital yet overlooked organs, controlling stress adaptation, inflammation, blood pressure, metabolism, immune balance, and energy production. While severe adrenal failure such as Addison’s Disease is recognized in medicine, milder adrenal dysfunction often goes undiagnosed for years. Chronic stress, poor sleep, illness, medications, and nutritional deficiencies can impair adrenal function long before traditional testing reveals dise

David Stephen Klein, MD FACA FACPM
Jul 215 min read


Alpha-Lipoic Acid: A Powerful Tool for Metabolic Health, Weight Loss, Insulin Resistance and Brain Protection
Alpha-lipoic acid (ALA) is a powerful antioxidant that plays an important role in metabolism, weight management, and brain health. Research shows it may improve insulin sensitivity, support healthy blood sugar regulation, promote fat metabolism, and help protect against cognitive decline by reducing oxidative stress and improving mitochondrial function. For patients focused on longevity and prevention, ALA may represent one of the most versatile evidence-based nutritional int

David Stephen Klein, MD FACA FACPM
Jul 165 min read


DHA and Dry Eye Disease: The Missing Nutrient in Ocular Surface Health
Dry eye disease is often treated with artificial tears, but emerging research suggests the problem may run much deeper. Deficiency of DHA, a critical omega-3 fatty acid concentrated in the retina and ocular surface, may contribute to inflammation, tear instability, and meibomian gland dysfunction. Understanding the nutritional connection between DHA and ocular health may provide a more effective long-term strategy for improving comfort, protecting vision, and reducing chronic

David Stephen Klein, MD FACA FACPM
Jul 146 min read


Can a Simple CBC Predict Future Dementia Risk?
The Monocyte-to-Lymphocyte Ratio and Its Emerging Role in Cognitive Decline. One of the cheapest test that is currently available. Can a Simple CBC Predict Future Dementia Risk? Understanding how the Monocyte-to-Lymphocyte Ratio (MLR) may reveal early inflammatory changes associated with Alzheimer’s disease, vascular dementia, and accelerated cognitive aging. Quick Look Could a routine complete blood count reveal early warning signs of future dementia? A growing body of evide

David Stephen Klein, MD FACA FACPM
Jul 75 min read


How Room Humidity Affects Sleep Quality: An Overlooked Variable in Restorative Sleep
Most people focus on sleep duration, mattress quality, or circadian rhythm when trying to improve sleep. Few realize that bedroom humidity can profoundly influence airway comfort, thermoregulation, snoring, sleep fragmentation, and even overnight hormone balance. Maintaining proper humidity may be one of the simplest and least appreciated interventions for improving restorative sleep.

David S. Klein, MD FACA FACPM
Jun 235 min read


Vitamin D in Midlife May Reduce Future Tau Protein Burden: Implications for Dementia Prevention
A major new study published in Neurology demonstrated that individuals with higher circulating vitamin D levels during midlife showed significantly lower tau protein accumulation in the brain nearly two decades later. Tau protein accumulation is one of the central pathological hallmarks of Alzheimer’s disease and other neurodegenerative disorders. These findings suggest vitamin D optimization during midlife may represent an overlooked but potentially powerful intervention for

David Stephen Klein, MD FACA FACPM
Jun 156 min read


Increasing Metabolism Naturally
Metabolism is influenced by more than genetics. Strategic food choices, adequate protein intake, muscle preservation, sleep quality, and targeted supplements such as berberine, magnesium, alpha-lipoic acid, vitamin D, and L-carnitine can support healthy energy production and weight management. Learn evidence-based strategies to naturally optimize metabolic health.

David Stephen Klein, MD FACA FACPM
Jun 35 min read
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