Maybe he is right, I just found this in the net. I was researching melatonin and it's antidepressant effect. While I'm here, never take more than 1mg of melatonin in 24hours otherwise you will down regulate your melatonin receptors.
Protective effects of melatonin and omega-3 on the hippocampus and the cerebellum of adult Wistar albino rats exposed to electromagnetic fields
. As most users were adult male medical and military personnel, the average call was assumed to last six minutes and was judged safe if it resulted in no increase in temperature from the weak non-ionizing radiation emitted. Today, very young persons or those with much smaller brains and bodies in comparison to the 175 cm tall, 88 kg male phantom against which phones were first tested for their capacity to change temperature, use more than half of the world’s nearly 7 billion phones. Because they are often held directly next to the head and pulsed digital radiation is absorbed about 2 cm into the brain, the effects of mobile phones particularly on the central nervous system may be remarkable. Biological agents can be thought of as having two distinct types of impacts: those that constitute direct physical impacts such as change in structure, cell count, proteomics, etc.; and those that constitute functional or behavioral effects such as change in response time, memory, or other standardized measure of performance that have been well characterized through a battery of tests [2–4].
Previous investigations have confirmed a number of important structural impacts of EMF. A decrease in the number of Purkinje cells in the rats exposed to a 900 MHz electromagnetic field (EMF) was previously reported . Additionally, a significant decrease in the number of granular and pyramidal cells of the hippocampus, which play a key role in memory-related functions, was shown by stereological techniques that allow 3-dimensional imaging of location [5–7]. Other destructive effects have also been determined by different methods. Damage to the cortex, cerebellum, hippocampus, and basal ganglia have resulted from neuronal damage induced by exposure to a 900 MHz EMF .
Other studies have demonstrated critical functional changes after EMF exposures. The effect of EMF exposure on increasing permeability of the blood-brain barrier (BBB) has been well documented for more than four decades [9,10]. This increased permeability affects homeostasis and may cause leakage of serum albumin into brain tissue. This process also leads to neuronal degeneration in the brain . Currently, this property of EMF/RF is being used for enhanced uptake of chemotherapy in the treatment of brain cancer, while amplitude modulated current is being employed as part of a treatment involving tumor-treating fields (TTF) that can interfere with post-mitotic spindle formation and increase survival of seriously ill brain and pancreas cancer patients [12,13].