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.

Uric acid is best known for gout, but elevated levels are also associated with hypertension, kidney dysfunction, and cardiovascular risk. Research suggests that uric acid may influence blood pressure through oxidative stress, reduced nitric oxide, renin-angiotensin activation, renal vasoconstriction, and altered sodium handling. Learn how uric acid, kidney function, and hypertension may form a self-reinforcing cycle—and why lowering uric acid is not always the same as lowerin

Pulse pressure is the difference between systolic and diastolic blood pressure. For example, 120/80 mmHg produces a pulse pressure of 40 mmHg. Pulse pressure often widens with age as large arteries become stiffer. In older adults, a persistently wide pulse pressure may indicate increased arterial stiffness and cardiovascular risk, including stroke risk. It should be interpreted together with age, systolic and diastolic pressures, medical conditions, and overall cardiovascular

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.

Could a medication long used for bipolar disorder also help support mood, protect the brain, and promote healthy aging at much lower doses? Emerging research suggests low-dose lithium may enhance neuroplasticity, reduce neuroinflammation, improve mitochondrial function, and influence pathways involved in depression and cognitive decline. Learn the current science, safety considerations, and how a systems-based evaluation may improve outcomes.

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

A low-grade fever is often dismissed as insignificant, yet persistent mild elevations in body temperature may reveal important underlying physiologic stress. Infection, chronic inflammation, immune activation, endocrine dysfunction, and even hidden systemic disease can all influence temperature regulation. Understanding the body’s normal circadian temperature rhythm is equally important, since a temperature considered abnormal at one time of day may be entirely normal at anot

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

For decades, nutrition science focused primarily on omega-3 and omega-6 fatty acids. New research now suggests that C15:0 (pentadecanoic acid), a naturally occurring odd-chain saturated fatty acid, may represent an overlooked essential nutrient. Early evidence indicates C15:0 may support mitochondrial function, reduce inflammation, stabilize cell membranes, improve insulin sensitivity, and potentially influence longevity pathways involved in healthy aging.

Most people associate uric acid with gout, but emerging research suggests it may be far more important. Elevated uric acid has been linked to hypertension, cardiovascular disease, kidney disease, insulin resistance, endothelial dysfunction, and accelerated aging. While many laboratories consider levels up to 7.0 mg/dL “normal,” evidence suggests that levels below 5.5 mg/dL—and ideally near 5.0 mg/dL—may provide greater protection against vascular injury and chronic disease. U