Sunlight vitamin D3 has benefits throughout your body. It also helps in the absorption of calcium and phosphorus, which are essential for strong bones. It occurs naturally in food and can also be produced by our body when our skin is exposed to sunlight. This substance promotes a healthy immune system, as well as heart health, digestion, and even fat loss. There is evidence that it helps strengthen bones and muscles, boost immunity, stimulate mood, aid in weight loss, and improve heart function. However, if you require additional supplements then consult your doctor first.