Chris Mapletoft, an A-level student at independent Hampton School, fell ill at his home on June 18 and died the same day.
While doctors initially suspected that he was suffering from meningitis, an inquest into his death revealed that he had taken fat burning pills that contained 2,4-dinitrophenol (DNP) which has been banned in many countries.
Police officials confirmed the cause of death and revealed that they are currently conducting an investigation to find out from where he purchased the pills. "Dinitrophenol has no legitimate use as a medicine or food supplement, and is not safe for human consumption in any form. 'It is a poison which interferes with the normal way the body gets energy from fat. This can lead, as in this case, to death from overheating", a spokesman said.