This can be due to a variety of reasons, including having a diet consisting of high-inflammation foods (red and processed meat, baked goods, deep-fried items, bread, pasta, etc.) versus those that lower inflammation throughout the body (berries, fruits, avocados, nuts, etc.)
AMINO ACID - L-carnitine is a naturally occurring amino acid derivative that plays a crucial role in the production of energy in your cells mitochondria and may also aid in muscle preservation during training
Front Immunol 13(13):855795 Totino PR, Daniel-Ribeiro CT, Ferreira-da-Cruz Mde F (2011) Refractoriness of eryptotic red blood cells to Plasmodium falciparum infection: a putative host defense mechanism limiting parasitaemia
Musculoskeletal system: The aging of the musculoskeletal system is characterized by muscle atrophy, osteoporosis, and other symptoms