caffeine

And because cacao has much less caffeine than coffee, fans say it gives them an energetic boost without making them jumpy.

She said through her own research she had made changes to her lifestyle to manage her condition, including cutting down her alcohol and caffeine intake as well as engaging in low-impact exercise and prioritising sleep.

Other foods or ingredients, such as caffeine, are more often associated with intolerance.

"Given the effects that caffeine has on our bodies, we wanted to see if the time of day when you drink coffee has any impact on heart health," explained Dr Qi.

In the mornings during the time that I would normally have my espresso, my thoughts tried to bargain with me to find some way to consume caffeine: How about just one cup?