Sleep is one of the most important factors in building optimal health. However, modern people today tend to sleep less than previous generations and the quality of their sleep is also reduced. Poor sleep is linked to heart disease, type 2 diabetes, depression and obesity. The use of artificial light and electronic devices at night can contribute to these sleep problems.

The link between cell phone waves and cancer risk is controversial. Studies on this issue have spanned many years with conflicting results. Therefore, up to this point, there is no consensus on the cancer risk associated with cell phone use.