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The Genetic Hand You're Dealt: Life Is a Game of Five-Card Poker. Genetics and Epigenetics
Your genes are like the cards you're dealt in a poker game. Some people inherit a greater risk of diabetes, heart disease, Alzheimer's, or cancer, but genetic predisposition does not guarantee disease. Diet, sleep, stress, trauma, environmental exposures, and epigenetic regulation can influence how inherited risks unfold. Discover how everyday choices may change the odds of chronic disease and premature aging. A genetic predisposition is a reason for vigilance, not a declarat

David Stephen Klein, MD FACA FACPM
3 hours ago9 min read


PCOS, Polycystic ovary syndrome: Why Insulin and Testosterone Matter:
Polycystic ovary syndrome (PCOS) is more than an ovarian disorder. Insulin resistance, elevated insulin, and excessive testosterone frequently interact to disrupt ovulation and metabolic health. But is PCOS sometimes overdiagnosed? Learn why ovarian ultrasound findings alone are insufficient, how insulin and testosterone testing can clarify the clinical picture, and why an accurate diagnosis requires excluding other endocrine disorders.

David Stephen Klein, MD FACA FACPM
2 days ago12 min read


Perimenopause & Menopause Supplements: What Helps, What Doesn't, and When HRT Makes More Sense
Perimenopause can bring unexpected changes, including hot flashes, night sweats, disrupted sleep, mood fluctuations, brain fog, joint discomfort, and stubborn abdominal weight gain. With so many supplements marketed to women during this transition, determining which products genuinely help can be confusing.
Magnesium, calcium, vitamin D, rhapontic rhubarb, soy isoflavones, black cohosh, and DHEA are among the most frequently discussed options. However, not all supplements se

David Stephen Klein, MD FACA FACPM
Oct 2712 min read


Can Ferrous Sulfate Raise Ferritin? When Iron Supplements Help—or Hurt. Low Ferritin?
Can ferrous sulfate raise ferritin levels? Learn how oral iron supplements replenish iron stores, how hepcidin regulates absorption, and why low ferritin may contribute to fatigue and hair loss. Discover when iron supplementation is beneficial, why increasing ferritin does not guarantee hair regrowth, and the potential risks of unnecessary iron therapy. Understanding the cause of low ferritin is essential to choosing safe, effective treatment.

David Stephen Klein, MD FACA FACPM
Oct 219 min read


Your Ferritin May Be Low or “In Range”—But Is It Too Low for Healthy Hair?
Your ferritin may be marked “normal,” but does that mean your iron stores are adequate when you are losing hair? Iron deficiency can develop before anemia, and lower ferritin has been associated with telogen effluvium. But there is no proven universal ferritin target for hair growth—and low ferritin should not automatically mean taking iron. Learn why ferritin is a diagnostic clue, what can cause depleted iron stores, and why unexplained hair loss deserves a broader evaluatio

David Stephen Klein, MD FACA FACPM
Oct 110 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


Lactoferrin-Rich Colostrum and Better Sleep
Quality sleep depends on far more than melatonin. Emerging research suggests that lactoferrin-rich bovine colostrum may promote restorative sleep by reducing inflammation, supporting the gut-brain axis, balancing immune function, and maintaining healthy iron metabolism. Rather than acting as a sedative, lactoferrin helps restore the biologic environment necessary for healthier sleep—and potentially healthier aging.

David Stephen Klein, MD FACA FACPM
Jul 2011 min read


Hashimoto’s Thyroiditis: Diagnosis, Root Causes, and Modern Treatment Strategies
Hashimoto’s thyroiditis is the most common autoimmune cause of hypothyroidism, yet many patients remain undiagnosed for years because standard thyroid testing often misses early dysfunction. Understanding the immune attack on the thyroid, the role of inflammation, nutrient deficiencies, genetics, and environmental triggers can help identify the condition sooner. Early diagnosis and targeted treatment may help restore thyroid function and improve long-term health outcomes.

David Stephen Klein, MD FACA FACPM
Jul 175 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


Pre-Diabetes: Insulin Resistance, Is It a Real Condition — Or a Warning Sign We Ignore at Our Own Risk?
Many people are told they have pre-diabetes and assume it simply means they may someday develop diabetes.
The truth is far more concerning.
Long before someone officially develops Type 2 diabetes, elevated insulin levels and subtle abnormalities in blood sugar regulation may already be damaging blood vessels, nerves, kidneys, and even the brain.
Prediabetes is not almost disease.
It is often the earliest measurable sign that metabolic dysfunction has already begun.
The g

David Stephen Klein, MD FACA FACPM
Jul 36 min read
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