Caffeine tolerance test tells you how fast your body can genetically metabolise caffeine. The metabolising rate also affects heart attack risk to some extent.
Caffeine tolerance is a condition when caffeine has no more effect on the person’s body.
Caffeine is the most consumed psychoactive substance and therefore a drug. It was estimated that about 80% of the world’s population consume caffeine every day. The popularity of this substance is connected with its ability to alleviate fatigue, increase the feeling of wakefulness and improve concentration and focusing.
However, it was estimated that 5 grams of caffeine (30-40 cups of regular coffee) may result in the death of the consumer.
The chemical formula of caffeine is C8H10NO2. A substance chemically is similar to adenosine, an agent that makes a person feel tired. In the body, this compound slows down nerve activity and therefore promotes sleep. Adenosine influences on the blood and oxygen supply to the brain by dilatation of the vessels. The level of adenosine in the body increases gradually during the day and it is suggested that this substance is responsible for the need to sleep.
Caffeine binds to the adenosine receptors in the brain and this way stimulates the central nervous system. At the same time caffeine influences on a hormonal balance causing the growth of adrenaline level and the alertness increases Another effect – feeling of arousal – is connected with the increasing level of dopamine in the brain after the consumption of caffeine.
Caffeine can be synthesized from uric acid, although it occurs naturally in the leaves, seeds, or fruit of more than 60 plant species, including:
- Coffee beans ;
- Tea leaves;
- Kola nuts;
- Cacao beans ;
- Yerba mate;
Caffeine may be found in coffee, tea and chocolate, but it is also added to gum, jelly beans, waffles, water, syrup, and more. Caffeine may be even be added to marshmallows, sunflower seeds, and other snacks for its stimulant effect.