It is known that vitamin D is synthesized in the epidermis of the skin under the influence of sunlight. Therefore, many people believe that they get enough vitamin D during the summer. However, this is a controversial issue. Numerous studies have shown that even individuals who spend a significant portion of their day in the sun may have a deficiency of vitamin D. This depends on various factors, such as geographical latitude, skin type, and more. In addition to that:

1. Not all summer days are sunny.

2. Even though it is summer and sunny outside, sunlight passing through windows into a room will not produce vitamin D in the skin's epidermis.

3. Sun exposure will not help if a child is dressed or in a covered stroller.

4. Sunscreen also prevents the production of vitamin D.

Therefore, pediatricians recommend not discontinuing the intake of vitamin D supplements both in winter and summer, except for days when children spend a few hours literally naked in the sun.