1, choose the appropriate time: 8- 10 or 3-5 pm, when the sun is soft.

2, bare skin: such as head, limbs and back, direct contact with sunlight helps to synthesize vitamin D.

3, pay attention to hydration: avoid excessive sweating leading to water-electrolyte imbalance.

I think the sunshine time is as follows: 20-30 minutes in spring and autumn, 30-60 minutes in winter and 5- 10 minutes in summer. Young and middle-aged people get sunshine 1-2 hours every day.

Precautions:

1, the elderly need someone to bask in the sun to avoid catching a cold.

People with weak constitution should avoid being exposed to the sun for too long to avoid collapse.

2. Patients with cataract need to wear protective glasses.

3. Sunbathing through glass affects vitamin D synthesis.

4. Don't use sunscreen excessively, which may hinder the synthesis of vitamin D. ..