Most people with vitamin D deficiency may not show any symptoms. However, those with severe deficiency might experience:

• Recurrent infections
• Bone pain
• Weakened or fragile bones

• Moderate sun exposure is the best natural way to maintain healthy vitamin D levels.
• The amount of vitamin D produced from sunlight depends on:
• Time of day
• Skin tone (lighter skin produces vitamin D more quickly than darker skin)
• Amount of skin exposed to sunlight
• Apart from sun exposure, there are limited natural food sources of vitamin D, such as:
• Fatty fish (salmon, tuna, mackerel)
• Beef liver
• Cheese
• Mushrooms
• Egg yolks
• To help meet daily requirements, many foods are fortified with vitamin D, including:
• Dairy products
• Orange juice
• Breakfast cereals
• Infant formula

A recently discovered component that affects fertility is vitamin D. Studies show that deficiency in vitamin D frequently lowers the likelihood of pregnancy in women undergoing IVF.

The study also demonstrated that women with appropriate vitamin D levels produce eggs of higher quality and achieve successful embryo implantation than do those with inadequate vitamin D levels. Women with vitamin D deficiency had significantly decreased overain reserves.