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Calcium and Vitamin D. Calcium and vitamin D are two of the most important nutrients for bone and muscle health. Calcium can be found in dairy products, leafy green vegetables, almonds and calcium-fortified foods and juices.Vitamin D helps the body absorb calcium, so many fortified products with calcium also have added vitamin D. This vitamin also boosts muscle strength and helps prevent muscle weakness.alcium can be found in dairy products, leafy green vegetables, almonds and calcium-fortified foods and juices. Vitamin D helps the body absorb calcium, so many fortified products with calcium also have added vitamin D. This vitamin also boosts muscle strength and helps prevent muscle weakness.
Carefully planned nutrition must provide an energy balance and a nutrient balance. The nutrients are: 1  Proteins-essential to growth and repair of muscle and other body tissues. 2  Fats-one source of energy and important in relation to fat soluble vitamins.3  Carbohydrates-our main source of energy.4  Minerals-those inorganic elements occurring in the body and which are critical to its normal functions.he nutrients are: 1  Proteins-essential to growth and repair of muscle and other body tissues. 2  Fats-one source of energy and important in relation to fat soluble vitamins. 3  Carbohydrates-our main source of energy. 4  Minerals-those inorganic elements occurring in the body and which are critical to its normal functions.