Bone health matters—no bones about it! At SIU Medicine, our team is educating the community to learn more about bone health, including what can affect your bone mineral density and how to protect it. The bare bones of bone health: 5 quick things to know Bone mineral density refers to how strong your bone tissue is. The lower your bone mineral density, the weaker your bones. Most people achieve peak bone mineral density by their late 20s. After this age, the focus is on maintaining bone strength and minimizing bone mineral loss. Drinking milk, just by itself, may not be good for your bones