Green tea contains an amino acid called L-theanine, which is thought to be responsible for its ability to increase energy and improve mental focus. It has been associated with improvements in heart health, weight management, and mental health, including reducing the risk of depression, improving memory, and reducing the risk of dementia. Green tea is one of the most commonly consumed beverages in the world and is famous for its health benefits. Green Tea Image Credit: Na visky, Unsplash Additionally, caffeine tends to have a negative impact on children’s sleep and may displace healthy nutrient intake by displacing nutritious foods and beverages in the diet.
Children may be more sensitive to the effects of caffeine due to their smaller body size. Pregnant and breastfeeding women should additionally be cautious with their caffeine intake because it may affect their health and the health of their babies. The World Health Organization suggests that healthy adults consume less than 2–4 cups of coffee per day. The FDA recommends daily caffeine intake of no more than 400 milligrams a day but suggests that pregnant women and young adults be cautious about their caffeine intake. Some people may never develop a caffeine tolerance, but for others, it may take just a few weeks. Some people are more sensitive to caffeine than others, and the amount that it takes to trigger a reaction will vary from person to person. Caffeine tolerance can develop over time but is different for each person. This can lead to headaches after caffeine intake is stopped. What this means is that when we regularly block the action of adenosine with caffeine, our brains have less room for waste products. If consumed in the later part of the day it’s also associated with disturbed sleep (insomnia), especially when caffeine use is high or above 300mg per day. These chemicals are responsible for making us more alert and able to focus.Ĭaffeine also affects the heart by increasing the force of contraction and blood flow through the body, making it a common ingredient in sports drinks. When adenosine is blocked, neurons in the brain are less inhibited, which leads to an increase in neurotransmitter chemicals norepinephrine and dopamine. Once in the brain, caffeine blocks the inhibitory neurotransmitter adenosine, which is responsible for making us feel sleepy. When ingested, caffeine is absorbed by the gastrointestinal tract into the bloodstream, where it travels to the brain and enters the central nervous system to produce its effects. Image Credit: Casimiro PT, Shutterstock How Does Caffeine Affect the Body?Ĭaffeine is a central nervous system stimulant that increases the amount of mental and physical energy.
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