Beta-blockers inhibit CoQ10-dependent enzymes in the heart muscle. This is the primary mechanistic explanation for exercise intolerance and fatigue seen with beta-blocker therapy.
Kishi et al. (1977) — first demonstration of CoQ10 enzyme inhibition by beta-blockers; Hamada et al. (1984)
Fatigue, reduced exercise tolerance, worsening heart failure symptoms, cold extremities
Ubiquinol 200–300mg daily with meals. Discuss with cardiologist — CoQ10 supplementation is well-documented in cardiac care.
View on Fullscript: Life Extension Super Ubiquinol CoQ10Discuss with your physician before adjusting supplementation. This is educational content, not medical advice.
Beta-blockers suppress nocturnal melatonin secretion by blocking beta-adrenergic stimulation of the pineal gland — the primary driver of melatonin synthesis.
Brismar et al. (1988) — 50% reduction in nocturnal melatonin with metoprolol; confirmed in multiple subsequent studies
Insomnia, poor sleep quality, daytime fatigue, disrupted circadian rhythm
Melatonin 0.5–3mg 30–60 minutes before bed. Use lowest effective dose — more is not better.
View on Fullscript: Life Extension Melatonin 300mcgDiscuss with your physician before adjusting supplementation. This is educational content, not medical advice.
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