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| Caffeine from coffee can invade your sleep |
Coffee can be an enchanting adventure, where both your taste and caffeine demands are for filled, but even if coffee has a lot of upsides, theres a shadow side to every fairytale. I clearly remember some nights, where I was experimenting with different extraction methods - resulting in tasting every produced/extracted shot. Around my normal sleep hours, I couldn't sleep and actually not at all these particular nights, leaving coffee or more precise the caffeine a negative experience.
So what does the medical paradigm apply, when talking coffee/caffeine downsides? - Here´s a short, but precise list.
1. Sleep changes
Like described above - I have tried this on my own body and its a pain, because its not physically possible to sleep due to the high level of caffeine in your body. The sleep changes provided by the caffeine can also cause anxiety and irritability, in some with excessive coffee consumption. Another thing is that many coffee drinkers are familiar with "coffee jitters", a nervous condition that occurs when one has had too much caffeine.
2. Cholesterol
In 2007 a study by the Baylor College of Medicine indicated that some substances only found in coffee, these are cafestol and kahweol. These two molecules may raise levels of low-density lipoprotein (also known as LDL) in the human body. The link between the molecules and cholesterol is that when increasing the LDL, its an clear indicator for higher cholesterol, in other words the Baylor study suggested a possible link between cafestol, kahweol and higher levels of cholesterol in the body.
An upside of this study also states that paper coffee filter have a property that binds to these compounds and therefore allows the filter to remove most of the cafestol and kahweol found in coffee. BUT brew methods which do not use a paper filter, such as the use of a french press, do not remove cafestol and kahweol from the final brewed product.
3. Blood pressure
Caffeine has previously been implicated in increasing the risk of high blood pressure; however, recent studies have not confirmed any association. In a 12-year study of 155.000 female nurses, large amounts of coffee did not induce a "risky rise in blood pressure". Previous studies had already shown statistically insignificant associations between coffee drinking and clinical hypertension.
4. Cancer
Over 1.000 chemicals have been reported in roasted coffee and 19 of these are known rodent carcinogens; however, most substances cited as rodent carcinogens occur naturally and should not be assumed to be carcinogens in humans at exposure levels typically experimented in day-today life, but there is still a chance.
5. Yellow teeth
Maybe you have already seen the teeth of a smoker and thought that a nasty set of yellow grills, but actually coffee is known for the same contributing factors that color your teethes yellow.
Keep drinking coffee everyone!
// Hendrup
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