Caffeine is
a natural stimulant most commonly found in tea, coffee and cacao plants.
It works by
stimulating the brain and central nervous system, helping you to stay alert and
preventing the onset of tiredness
Once
consumed, caffeine is quickly absorbed from the gut into the bloodstream.
From there,
it travels to the liver and is broken down into compounds that can affect the
function of various organs.
That being
said, caffeine's main effect is on the brain.
It functions
by blocking the effects of adenosine, which is a neurotransmitter that relaxes
the brain and makes you feel tired.
Normally,
adenosine levels build up over the day, making you increasingly more tired and
causing you to want to go to sleep.
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.
Many of us
rely on a morning cup of coffee or a jolt of caffeine in the afternoon to help
us get through the day. Knowing the symptoms of caffeine and its long-term
effects on your body may make you think twice about having it always.
ALERTNESS:
The stimulating effects of caffeine cause immediate alertness. It can
also temporarily relieve drowsiness and fatigue.
RAPID HEARTBEAT: Caffeine can cause a rapid
heartbeat. This may be a concern if you have a preexisting heart issue. You may
notice arrhythmias (irregular heartbeat) whenever you take it.
MUSCLE ACHES: Muscle ache could be a sign of
caffeine withdrawal.
FERTILITY ISSUES: Some women who consume too much
caffeine might experience difficulties getting pregnant. If you are trying to
get pregnant, it’s best not to consume more than 300mg per day.
PREGNANCY ISSUES: Overconsumption of caffeine during
pregnancy may cause miscarriage and developmental issues in newborns. It’s
recommended that women who are pregnant consume not more than 200mg of caffeine
per day.
JITTERS: If you are not used to caffeine, it
can give you jitters. If you have an anxiety disorder or sleep disorder,
caffeine may make it worse.
HIGH URINATION: Caffeine causes increased
urination. Long-term use of caffeine may increase bladder instability and
worsen the risk for those already experiencing bladder problems.
CAFFEINE IN BONES: Caffeine prevents calcium
absorption in the bones, thereby increasing your risk of osteoporosis. As one
gets older, your bones may break more easily.
NAUSEA AND VOMITTING: Nausea and vomiting are symptoms of
having too much caffeine.
CONFUSION: Too much caffeine can over
stimulate the brain, leading to confusion.
HEADACHES: Headache can occur from either too
much caffeine or as a symptom of caffeine withdrawal. In small amounts, it can
relieve symptoms of a hangover.
Caffeine
provides no nutritional value on its own. It’s tasteless, so you won’t
necessarily know if it’s in your food either. Even some medications may contain
caffeine without your knowledge.
This
ingredient almost always causes some symptoms. At a minimum, you may feel more
energetic, but over time, too much caffeine may cause withdrawal symptoms. As
you consume the same amount of caffeine on a daily basis, your body develops a
tolerance to it. Other factors like your age, body mass and overall health can
determine your tolerance to caffeine, too.
An overdose of
caffeine can result in death due to convulsions. Overdosing happens by
consuming large amounts of caffeine, most often in energy drinks or diet pills.
Up to 400 milligrams of caffeine is considered to be safe. This equals about 4
cups of coffee, although the amount of caffeine in beverages varies widely.
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