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Vitamin D is a Hormone
Vitamin D is commonly thought of as a simple nutrient, but medically it functions as a steroid hormone with effects far beyond bone health. Unlike true vitamins, vitamin D is synthesized in the skin, activated through the liver and kidneys, and acts on receptors throughout the body to regulate gene expression. This hormonal role explains its influence on immune function, muscle strength, cardiovascular health, and brain function. Because deficiency is widespread and supplemen

David S. Klein, MD FACA FACPM
Jan 244 min read


The Link Between Estradiol and Bone Health: Preventing Osteoporosis, Osteopenia, and Dementia
By restoring estradiol through evidence-based bioidentical hormone therapy, guided by physicians experienced in integrative care, you can reduce fracture risk, sustain memory, and enhance life quality.

David S. Klein, MD FACA FACPM
Nov 20, 20255 min read


Bioidentical Hormone Replacement Therapy (BHRT): What it is, who benefits, and what the FDA says now
Bioidentical Hormone Therapy in Central Florida | Stages of Life Medical Institute

David S. Klein, MD FACA FACPM
Nov 12, 20254 min read


The Value of Vitamin D3, Strontium, and Vitamin K2 in Osteoporosis Prevention and Treatment
Vitamin D-3, Strontium and Vitamin K-2 are necessary to prevent and treat osteoporosis.

David S. Klein, MD FACA FACPM
Aug 18, 20253 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


Unveiling the Three Pillars of Nutrient Absorption: Rate, Route, and Amount
Understanding the nature of nutrient absorption, simplified.

David S. Klein, MD FACA FACPM
Jan 31, 20255 min read


Nutritional Factors in Treatment of Osteoporosis. Strontium, Calcium, Vitamin K-2 and Vitamin D-3
Know the remarkably few nutraceuticals that you must take to prevent, reduce or reverse osteoporosis and osteopenia.

David S. Klein, MD FACA FACPM
Mar 7, 20248 min read


Reducing Cancer Risk with Vitamin D-3, Cholecalciferol
Why Vitamin D??? Well, for starters, Vitamin D-3 is not a vitamin at all. Vitamin D is a family of steroidal hormones that the body...

David S Klein, MD
Sep 2, 20233 min read


Four Essential Products for Osteoporosis
David S. Klein, MD, FACA, FACPM Osteoporosis is not just a condition of the elderly, or a disease that only hits 'old ladies.' Bone is...

David S Klein, MD
Aug 17, 20237 min read
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