Over the years, public and medical opinions about the sun and sunlight have changed significantly. While in the past the sun was seen as a divine natural element with healing power, it is now referred to as a carcinogen that people should shun in order to avoid diseases.

Sunlight for combating ‘Diseases of Darkness’

History shows that sunlight was used in ancient societies for medical purposes with research revealing that it promoted robust bones in the human system. Not so long ago, people used sunlight to treat tuberculosis and rickets, conditions commonly referred to as diseases of darkness.

In the early 1900s, researchers developed ways of using sunlight to treat the manifestation of tuberculosis on the skin. This led to the treatment of physical and mental illnesses through phototherapy.


Apart from being useful in therapeutic treatment of disease, it has been found that humans benefit from the various parts of the light spectrum. Contrary to claims that sunlight can cause cancer, researchers such as Dr. Rollier have actually used it to treat the disease.

Vitamin D synthesis

The ultraviolet B rays of the sun promote the synthesis of vitamin D by the upper layers of the human skin. This is important in fighting rickets in children and strengthening bones. When given to coal miners, it was found that UVB light made them work harder.

This means that exposure to the sun will facilitate vitamin D production and deliver the benefits of its full spectrum of light. When used with diligence, and with the knowledge, skills and technologies that our ancestors used, sunlight can prevent and treat diseases.

Gradual exposure to the sun

Plants and animals have natural mechanisms of responding when they have had enough exposure to the sun. Human beings do not have hair to protect it from too much sunlight. However, the skin has its own way of protecting itself from solar radiation. Through gradual exposure of the skin to sunlight, it will acclimatize through a thickening process.

Effects of sunlight

Exposure to the sun is not only necessary but also important for human health. At the appropriate dosage, sunlight can play an important role in the running of biological systems. In order to debunk the claim that the sun is a carcinogen, it would help if people were educated on the optimal dosage that they bodies need.