What is health care? what are the vitamins useful for daily workout?​

1. healthcare is the preservation of mental and physical health by preventing or treating illnesses through services offered by the health profession and its staff.

2. Increasing vitamin D levels provides multiple musculoskeletal benefits. Increases in muscle protein synthesis, ATP concentration, strength, jump height, jump velocity, jump power, exercise capacity, and physical performance are achieved with increased vitamin D levels.

Yes you are correct use the scientific method