An NHS doctor has shared the surprising reason why energy drinks may leave you feeling exhausted despite their reputation for boosting alertness.
Known to many as quick pick-me-ups for situations such as pressing work deadlines or gearing up for major events, some have discovered that these caffeinated beverages have the reverse effect, making them feel drowsy and prompting a nap instead.Dr Karan Raj, an NHS GP, has pinned this phenomenon down to a genetic "glitch".
Taking his insight to social media, he posted on TikTok under the handle @dr.karanr, discussing how individual genetic variations affect our bodies' interaction with caffeine.
He states: "If caffeine makes you feel tired, it might be because of a software glitch in your caffeine gene."Broadly speaking, people can have fast or slow caffeine metabolizers.