NAC for Longevity: What the Evidence Actually Supports
N-acetylcysteine has real clinical uses, yet the wellness case for daily capsules rests on thin evidence and a supplement supply chain that is hard to trust.
Exercise Snacks: What Short Bouts Can and Cannot Do
Brief vigorous bouts spread through the day can improve fitness in inactive adults, but exercise snacks are not a full substitute for proper training.
DHEA After 50: Hormone Signal, Not a Shortcut for Ageing
DHEA falls with age and can shift sex-hormone levels, but evidence for ageing, cognition, libido, and energy claims remains limited; safety matters.
Fasting-Mimicking Diets: Metabolic Promise, Real Limits
Fasting-mimicking diets may improve some metabolic markers in small trials, but they are not proven longevity treatment and need medical caution.
Cognitive Reappraisal for Stress: Useful, Not a Cure
Cognitive reappraisal can help some people work with stressful thoughts, but it is a skill, not treatment for anxiety, trauma, or crisis when support is needed.
Potassium and Blood Pressure: What the Evidence Says
Potassium-rich foods can help blood pressure, but the effect is modest and not safe for everyone. Kidney disease and medicines change the advice.
Resting Heart Rate: What the Number Can and Cannot Tell
Resting heart rate is a useful signal, but not a verdict. The number shifts with fitness, stress, illness, medicines, and how you measure it.
Alcohol and Sleep: Why the Nightcap Backfires Overnight
A nightcap can make you sleepy fast, but the evidence shows it fragments sleep later in the night and can worsen snoring and sleep apnoea.
Berberine for Metabolic Health: Promise, Not a Shortcut
Berberine may modestly improve blood sugar and lipids, but the evidence is short-term, mixed, and complicated by real drug-interaction risks.
Caffeine and L-Theanine: Modest Effects, Real Limits
Caffeine and L-theanine are often sold as a calmer way to stay alert. That is a bigger claim than the evidence supports. Caffeine is the active stimulant here; L-theanine may soften some of caffeine’s rough edges for some people. What matters is the dose, the form, and whether the product on the shelf matches the … Read more