Caffeine, especially coffee, is one of the most disputed stimulants on Earth. With many individuals claiming it causes headaches and anxiety, there now exists an anti-caffeine community who prey on the vulnerable and uninformed. Personally, taking caffeine pills and drinking coffee is habitual, but not in an anti-drowsiness way. Instead, I use this stimulant to promote numerous benefits, from increased energy and calcium release to myocardium protection and cognitive enhancements—it really does it all.

Simply put, caffeine is an adenosine receptor antagonist. This means that caffeine works by blocking adenosine receptors in the brain. In other words, caffeine stops the promotion of sleepiness by slowing down neural activity, like other stimulants. Therefore, this stimulant leads to increased alertness and energy. Also, during its progression, caffeine indirectly increases the levels of certain neurotransmitters, such as dopamine and norepinephrine, both of which are known for enhancing mood, intensity, and pleasure. At higher concentrations, typically over 200mg, caffeine inhibits an enzyme called phosphodiesterase, further stimulating cells.

Unfortunately, historical studies have suggested to wider society that caffeine has various health concerns. For example, the earliest studies on caffeine implied that even the slightest exposure could lead to an increased cardiovascular disease risk. However, what these researchers forgot to mention was causation. Their findings declared that caffeine increases blood pressure, which is obvious due to cell stimulation, and due to this, it increased cardiovascular risk. Originally, the scientific consensus directly correlated high blood pressure with cardiac diseases, but more up-to-date scientific evidence suggests that this link is completely baseless.

In fact, current empirical data implies that caffeine consumption has the opposite effect. Instead of increasing the risk of myocardium disruption, it has protective benefits. For example, due to caffeine being rich in antioxidants, it can neutralise free radicals (highly reactive electron-stealing particles). Furthermore, due to cell stimulation, caffeine causes the body to produce nitric oxide to help dilate blood vessels and improve blood flow. Originally correlated with high blood pressure, this biological reaction instead reduces blood pressure post-metabolism, leading to increased heart strength.

Not only this, but the current consensus links high adipose tissue to cardiovascular risk. But, due to heart stimulation, caffeine enhances lipid metabolism, leading to reduced LDL levels, which, in turn, reduces the risk of plaque building up in the arteries—a primary factor in cardiovascular disease.

However, it doesn’t stop there.

Caffeine not only has myocardium benefits but also neurological ones. Due to the numerous biological pathways, it travels through, this stimulant can stabilise memory traces. For example, when we consume caffeine and go through adenosine receptor blockages, we experience much better memory consolidation into our long-term memory. This process, alongside improved recall, is correlated with reduced cognitive decline as we age, especially in terms of neurological diseases like Alzheimer’s. With continuous consumption, typically daily, our neurochemistry changes to exhibit more receptor expression and sensitivity. In other words, it gives our brain the ability to protect against neuron damage over time, even when we do not consume the stimulant.

Beyond its cognitive benefits, caffeine has been proven to benefit physical performance. Studies show that caffeine stimulates our central nervous system, which not only links to delayed fatigue onset but also sustains extended energy output. For example, due to its release of adrenaline, the “fight-or-flight” hormone, caffeine prepares our muscles for exertion. As a result, not only do we experience better physical output, but our bodies also undergo increased fat oxidation due to an increased energy need from the heart rate rise.

Speaking of which, caffeine’s metabolic benefits extend beyond cardiovascular health and into lipolysis, or weight management, in other words. With extended consumption, we increase our basal metabolic rate, meaning that the body burns more calories over a 24-hour period, even at rest. According to recent meta-analyses, those who consume caffeine, either directly or indirectly, have slightly higher BMR levels, supporting fat loss and preventing obesity—a key factor in cardiovascular disease.

Additionally, emerging research has examined caffeine’s benefits for liver health. Recent studies have found that regular coffee drinkers are at a lower risk of developing liver diseases such as cirrhosis and hepatocellular carcinoma, the most common type of liver cancer. This is due to the antioxidants in coffee that help combat oxidative stress within the liver. Alongside this, the caffeine within coffee appears to influence liver enzyme levels, helping reduce inflammation and prevent the accumulation of scar tissue.

Finally, caffeine may play a potential role in reducing the risk of type 2 diabetes. Ignoring fat metabolisation, this stimulant improves insulin sensitivity. However, it is difficult to determine whether this is due to compounds within coffee, like chlorogenic acids, magnesium, and various polyphenols, or if it is due to the increased epinephrine from acute consumption. Nonetheless, we do know that there are positive effects associated with consuming it.

My personal recommendation is to drink caffeinated coffee. If you belong to the subgroup that claims caffeine causes anxiety or headaches, I implore you to try consuming caffeine pills to see if they have the same effect. If you experience the benefits of this stimulant without any side effects, then the adverse reactions you are experiencing may be due to the quality of your coffee, not the caffeine itself.

Personally, I drink mould- and pesticide-free coffee, alongside consuming caffeine pills. This way, I can encourage all the possible benefits from coffee’s antioxidants alongside the added physical energy needed for workouts. An example of my intake is a shot of espresso before lunch, and then 200 mg of caffeine in a capsule pre-workout, at about 7 pm.

I do urge you to check the quality of the coffee you are drinking. Most of the biggest brands, spray numerous pesticides on their coffee beans and contain mould, especially in capsule form.

Simply enter “mould and pesticide-free coffee” in your preferred search engine to find what you are looking for. But, if you want quick access, my favourite so far is Balance Coffee.