"high in caffeine" is a correct and usable phrase in written English.
It can be used to describe something that contains a large amount of caffeine, such as a drink or a food item. Example: "This energy drink is high in caffeine, providing a quick boost of energy."
This includes caffeinated drinks, like coffee, as well as foods high in caffeine, like chocolate.
"The pill has echoes of the grapefruit diet and includes guarana which is high in caffeine yet states it's caffeine free.
Five people may have died over the past three years after drinking Monster Energy, a popular energy drink that is high in caffeine, according to incident reports recently released by the Food and Drug Administration.
Like all filter coffees, it is comparatively high in caffeine at that point, so, in order that you do not end-up bouncing off the walls, it needs to be let down with around 50% water and then chilled, before serving – over ice if you wish.
"Try decaffeinated tea and coffee, fruit juice or water and limit the amount of 'energy' drinks, which may be high in caffeine.
3. The two coffee strains are arabica and robusta Robusta is more productive, disease resistant, and high in caffeine content.
Because açaí pulp degrades quickly, it had to be frozen before being shipped, so in Rio and São Paulo it is served like ice cream, its almost dirtlike undertaste made attractive to urban palates by the addition of sugar and, often, extract of guarana, an Amazonian fruit that is higher in caffeine than coffee.
It is higher in caffeine than some other teas and can cause nausea, jitteriness, or irritability in some people.[16].[16]
Participants were also instructed to avoid food and drink high in sugar, caffeine, or alcohol and to refrain from strenuous exercise both on the day preceding the study and throughout the study period.
Participants were advised before each visit for the measurement of vascular function to avoid strenuous physical activity, foods high in fat, caffeine, or alcohol on the previous day; subjects were provided with a list of foods to avoid and a low-fat evening meal (<10 g fat; 2 3 MJ) before fasting overnight from 2200.
Such drinks can include those high in sugar, caffeine, dairy, or carbonation.
