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Persistent Fatigue Is Not a Diagnosis
Persistent fatigue is not a diagnosis but a signal of underlying physiologic imbalance. Chronic low energy is often driven by overlooked metabolic dysfunction, hormone signaling abnormalities, sleep disruption, immune activation, or autonomic imbalance—frequently despite “normal” labs. A systematic, physician-led evaluation can uncover reversible causes and restore vitality rather than merely suppress symptoms.

David S. Klein, MD FACA FACPM
Jan 284 min read


Is It Dementia — or Is It Something Else? Medical Conditions That Can Mimic Dementia and Cognitive Decline
Is It Dementia — or Is It Something Else?
Cognitive decline is frequently assumed to represent dementia, yet a wide range of medical conditions can closely mimic neurodegenerative disease and are often treatable when identified early. Acute delirium, commonly triggered by infection, dehydration, metabolic abnormalities, or medication effects, is one of the most frequently missed causes of sudden confusion and cognitive change. Medications themselves, particularly anticholiner

David S. Klein, MD FACA FACPM
Jan 265 min read


THC, REM Sleep, and the Quiet Disruption of Sleep Architecture
THC may shorten sleep onset, but research shows it suppresses REM sleep and disrupts normal sleep architecture. Over time, this can impair memory, mood, and restorative sleep—especially with nightly use. Understanding the difference between sedation and healthy sleep is critical.

David S. Klein, MD FACA FACPM
Jan 55 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


Peptide therapy: promise, pitfalls and what patients should know
Peptides are short amino-acid chains that act as highly specific signaling molecules and have become a major class of modern therapeutics. More than 80 peptide drugs are approved worldwide, including insulin, incretin analogues such as GLP-1 receptor agonists, vasopressin analogues and linaclotide. These agents provide effective, targeted therapy in endocrine, metabolic, gastrointestinal and oncologic indications, supported by robust randomized clinical trials and rigorous ma

David S. Klein, MD FACA FACPM
Dec 5, 20258 min read


Lactoferrin Containing Colostrum: Targeted Support for Sleep, Immunity, and Respiratory Health
Lactoferrin-rich colostrum occupies a unique niche at the intersection of mucosal immunity, systemic inflammatory control, and sleep regulation. By combining the broad matrix of colostrum with the targeted antiviral, antibacterial, and immunomodulatory activity of lactoferrin, these preparations can reduce the burden of upper respiratory infections, support resilient immune function, and modestly improve sleep quality in selected populations. As with any therapeutic nutrient,

David S. Klein, MD FACA FACPM
Dec 1, 20256 min read


Hearing Loss and Your Brain. Why Getting Hearing Aids Now Can Help Protect You From Dementia
Untreated hearing loss increases the risk of dementia by straining the brain and promoting social isolation. Early hearing-aid use helps preserve cognition and quality of life.

David S. Klein, MD FACA FACPM
Nov 18, 20257 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


Zepbound (Tirzepatide) for Weight Loss and Obstructive Sleep Apnea: Approved by Many Medicare Prescription Plans
Zepbound is a different type of GLP-1 used to treat weight problems. It is an advancement over the Wegovy-Ozempic class in that it is a dual receptor acting agent.
More so, it is covered under many Medicare Prescription plans in patients that suffer from sleep apnea (obstructive sleep apnea) after documentation with sleep study.

David S. Klein, MD FACA FACPM
Oct 17, 20254 min read


The Ideal Bedroom Temperature for a Restful Night's Sleep
Sleep is one of the most powerful tools we have for health. By keeping your bedroom in the 60–67°F range, you give your body the environment it needs to achieve restorative rest. Simple adjustments to your room’s temperature, bedding, and clothing can lead to profound improvements in sleep quality and overall well-being

David S. Klein, MD FACA FACPM
Oct 1, 20254 min read
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