Blog
TSH normal but symptoms persist: what labs to check next
TSH normal but symptoms persist? Learn which thyroid and non-thyroid labs can clarify fatigue, cold intolerance, hair loss, and weight change.
Creatinine in muscular people: when eGFR looks worse than it is
Creatinine in muscular people can make eGFR look falsely low. Learn when muscle mass, training, diet, and cystatin C change the kidney result.
Non-HDL cholesterol vs ApoB: which is more useful?
Non-HDL cholesterol vs ApoB: learn what each lipid marker shows, when non-HDL is enough, and when ApoB gives a clearer cardiovascular risk signal.
Balance decline after 50: why the vestibular system predicts how fast you'll age
A failed 10-second one-leg stand is linked to higher mortality risk after 50. Learn what balance tests show, when to seek care, and how to train safely.
Hostility and cardiovascular aging: how chronic anger ages the heart faster
Cynical hostility predicts heart disease and accelerated aging. Why chronic anger damages arteries — and what 50 years of research says about reversibility.
How fast should eGFR decline with age? Normal slope vs accelerated decline
How fast should eGFR decline with age? Normal loss is 0.7-1.0 mL/min per year after 40. Learn when your year-over-year slope is concerning.
Retinoids for skin aging: how tretinoin, retinol, and retinaldehyde actually work
Tretinoin, retinol, and retinaldehyde are the only topical class proven to reverse photoaging. Here's the evidence, the conversion ladder, and how to start without wrecking your skin.
Sleep apnea in men: the silent driver of accelerated cardiovascular aging
Untreated sleep apnea adds ~6 years of biological aging in men. Why OSA hits male cardiovascular health hardest, plus what tracking can reveal.
Subclinical hypothyroidism: when slightly elevated TSH needs treatment and when it doesn't
Subclinical hypothyroidism affects 1 in 10 adults. Learn when slightly elevated TSH (4-10 mIU/L) needs levothyroxine, when to wait, and what it means for longevity.