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While the human body can produce L-carnitine in low quantities, a supplement is taken if more is required to improve health, support high-level athletic performance, or reverse medical problems
Mice studies do show that they live longer when given supplemental melatonin over the course of their lives, starting in adulthood.[ref][ref][ref][ref] Animal studies also show that melatonin supplementation (beginning in middle to old age) prevents the decrease in bone mass associated with aging.[ref] It also increases mitochondrial function.[ref] Melatonin is necessary to reap the benefits of exercise when aging.[ref] Supplemental melatonin also doubles insulin sensitivity in older animals.[ref] We dont do human studies on chronic calorie restriction to extend lifespan nor have there been long-term studies in humans on supplemental melatonin for fifty-plus years to know the effect
It is not approved by the MHRA and cannot legally be prescribed or dispensed in the UK as of May 2026
These are just some of the benefits
Mechanistic descriptions are based on well-established biochemical pathways and are presented for educational purposes only
