The secret technology of the US military reveals that drinking coffee requires scientific calculation.

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According to the Journal of Sleep Research, researchers at the American Academy of Sleep Medicine have developed a mathematical algorithm that allows everyone to drink coffee safely and increases the energy stimulated by drinking coffee by about 65%.

These calculations are carried out at the request of the US military. At present, this is still a secret technology, which will first be used in US military bases, and then may be promoted among ordinary consumers.

It is reported that this algorithm requires coffee to be drunk "by the hour". To determine the dose, everyone needs to answer a series of test questions, including activity time, sleep, weight, blood pressure and other important factors, the magazine said.

Previously, Spanish scientists have found that four cups of coffee a day can prevent many diseases and significantly reduce the risk of early death.