Pumpkin spice lattes are a favourite drink for many people in the autumn months, but experts warn that drinking one as soon as you wake up could be bad for you Even though it's technically still summer , September is just around the corner - meaning the return of pumpkin spice latte season. In fact, this fan favourite has already made its comeback in Starbucks this year. The iconic drink - whether you whip one up in your own kitchen or indulge in a store-bought treat every so often - is many folks' beverage of choice to kickstart a gloomy autumn morning with a caffeine jolt.

However, specialists are now flagging up that reaching for this beloved drink might not be the smartest move first thing. Consuming it early in the morning could potentially do more harm than good, they caution. Rex Isap, sleep expert and CEO at Happy Beds , has found that this sugary zap of caffeine could really be counterproductive, possibly leading to an increased tolerance to caffeine and amplifying stress levels.

Because of this, it's advisable to wait for a minimum of sixty minutes after rising before sipping on coffee, if you want to truly reap the awakening effects of caffeine, reports the Liverpool Echo . Rex explained: "Upon waking, our cortisol levels, often associated with stress, are at their peak. Surprisingly, cortisol enhances alertness.

Having caffeine while cortisol levels are already high may counteract this effect, possibly leading to a tolerance for caffeine. "Throughout the day, our .