Several studies over the years revealed the many health benefits of drinking coffee. For one, we know that coffee is packed with many nutrients essential for our health. Studies also revealed that coffee drinkers have a much lower risk of several serious diseases than those that do not drink coffee at all. For ease of reference these included:
The Benefits of Coffee
- Improve energy levels and alertness
- Helping you burn fat
- The caffeine in coffee is believed to drastically improve physical performance
- Lowers the risk of type II diabetes
- Protects you from Alzheimer’s disease and Dementia
- Lowers the risk of Parkinson’s disease
- Fights of depression and many others.
Scary Coffee Trends
Scientific data has been so strong that mid-last year a scary trend called Bulletproof coffee emerged.
Coffee drinkers blended their morning brew with up to 60 grams of butter and oil, normally coconut oil, in a bid to boost energy levels. According to coffee reviews, this is also delicious blend.
Claims were made that the rich coffee gives sustained energy and keeps caffeine addicts fuller for longer, because of the added kilojoules of energy. However, a registered dietician and blogger Celynn Erasmus argued that replacing breakfast on a regular basis with bulletproof coffee will certainly make it harder to reach nutrient and fiber requirements on a daily basis because 2 TBS butter and 2 TBS MCT oil provides a whopping 1200 kJ (300 calories) so it has to replace some food or another caloric beverage. If not, you could gain an extra 10 kg each year by having a cup per day! 
So there have been shared views from many experts in the field of nutrition about whether coffee consumption may be the answer to curing several serious diseases, but the answer remains unclear.
The Italian Study
In an Italian Longitudinal study, 1,445 people who were evaluated, scientists found that consistently drinking one to two cups of coffee each day is associated with a significant reduction in the risk of mild cognitive impairment (MCI), a precursor to dementia and Alzheimer’s disease compared to those who never or rarely consumed coffee. That supports a previous work, published in 2010, that showed that caffeine may have a neuroprotective effect.
The Coffee Contradiction
The surprise was that participants who increased their consumption over time saw their risk of mild cognitive impairment shoot up significantly. Those who went from one cup to more than one cup had twice the rate of MCI as those who reduced their drinking to less than one cup and 1.5 times the rate of MCI as those who continued to drink one cup a day.
The Results
The results suggest that cognitively normal older individuals who never or rarely consumed coffee and those who increased their coffee consumption habits had a higher risk of developing MCI.
The Analysis
According to washingtonpost.com one explanation the authors of the Italian study gave is that coffee may work by reducing inflammation in the brain. The second explanation is that it could be activating adenosine A2A receptors which play a role in oxygen consumption and blood flow. They wrote that they believed a steady stream of caffeine may be required “for normal memory performance” and increasing or decreasing consumption may result in impaired memory functioning.
A third explanation is based on the fact that caffeine is a powerful psychoactive stimulate. “Caffeine could in part compensate for the cognitive decline in older individuals because of its effects on vigilance and attention, mainly in situations of reduced alertness,” the authors told The Washington Post.