Alphalab Caffeine


Caffeine is a natural stimulant most commonly found in tea, coffee, and cacao plants. It stimulates the brain and central nervous system, helping you stay alert and prevent the feeling of tiredness. Nowadays, 80% of the world’s population consumes a caffeinated product at least once a day, everyday, and (1Trusted Source).


Once consumed, caffeine is quickly absorbed into the bloodstream. Where it then travels to the liver and is broken down into compounds that can affect the function of our brain.

Caffeine works by blocking the effects of adenosine, which is a neurotransmitter that relaxes the brain and is what makes you feel tired. Normally, adenosine levels build up over the day, making you gradually more tired as the day goes on, priming you for sleep later on.

Caffeine helps you stay awake by connecting to adenosine receptors in the brain without activating them. This blocks the effects of adenosine, leading to reduced tiredness

It may also increase blood adrenaline levels and increase brain activity of the neurotransmitters dopamine and norepinephrine. This combination further stimulates the brain and promotes a state of alertness and focus.


Because caffeine increases dopamine and norepinephrine, this changes brain messaging which is thought to in turn benefit your mood and brain function.

One review reports that after participants ingested 37.5–450 mg of caffeine, they had improved alertness, short-term recall, and reaction time. When it comes to mood though, more caffeine isn’t necessarily better. A study found that a second cup of coffee produced no further benefits unless it was consumed at least 6-8 hours after the first cup.


Because of Caffeine's ability to stimulate the central nervous system, caffeine is thought to increase your metabolic rate. Some studies have shown Caffeine increasing test subjects metabolism by up to 11-13%

Talking in a particle sense this would look like an extra 79 calories being burnt daily from consuming 300mg of caffeine.


When it comes to exercise, caffeine may increase the use of fat as fuel. This in turn helps the glucose stored in muscle cells last longer, delaying the time it takes your muscles to reach exhaustion because of the increased utilisation of fat as fuel. Caffeine being present in your body may also improve muscle contractions and increase tolerance to fatigue. Studies have shown that doses of 2.3 mg per pound (5 mg per kg) of body weight improved exercise performance by up to 5% when consumed 1 hour before training.


Caffeine consumption is generally considered safe, although can be addictive. Some side effects linked to excess intake include anxiety, restlessness, irregular heartbeat, and trouble sleeping. Too much caffeine may also promote headaches, migraine, and high blood pressure in some individuals.


The U.S. Department of Agriculture (USDA) and the European Food Safety Authority (EFSA) consider a daily intake of 400 mg of caffeine to be safe. This amounts to 2–4 cups of coffee per day. It’s recommended to limit the amount of caffeine you consume at one time to 200 mg per dose.