Optimal Body Fat Range for Health and Longevity

Maintaining body fat levels between 10 to 20% is generally beneficial for health and longevity, as exceeding or falling below this range can lead to lower energy levels, imbalanced sex hormones, reduced muscle mass, and decreased physical activity propensity. Regular blood work is recommended, with younger, drug-free individuals advised to do so every few years, while those over 35 or on drugs should monitor annually or more frequently to ensure optimal health.