My mother is 70 years old, weak bones, weak muscles, weak tendons. what is a great supplement for her?

Vitamin d3 2,000 IU: The single best supplement to address these concerns in addition to a balanced diet would be vitamin d3 2, 000 iu daily. Strong bones are needed to be able to build stong muscles and tendons. Vitamin d is frequently lacking. Calcium is usually sufficient in most individuals diet. Vitamin d deficiency is also linked with depression and loss of cognition.