Understanding Metabolism

Metabolism is the sum total of chemical reactions in the body that require energy. This includes processes like digestion, enzyme activity, and hormone production. Metabolism involves both catabolism (breaking down) and anabolism (building up), both of which require energy. The energy our body uses comes from the food we eat, which can be broken down for immediate energy or used as building blocks for various biological processes. Metabolism is influenced by factors such as body mass, lean body mass, exercise activity, and non-exercise activity thermogenesis. Hormones like thyroid hormone and testosterone also have an impact on metabolism, but their levels are largely influenced by energy intake. A faster metabolism is often associated with higher body mass, more movement, and potentially better satiety signals.