Potential problems from drinking coffee
If you are relying on caffeine to wake you up in the morning and get through the day in whatever form (coffee, energy drinks, numerous black teas) you may need to re-think your morning drink!
Caffeine from coffee is stimulant. For some people consuming too much coffee can cause heart palpitations and increase feelings of anxiety or jitteriness. If you're an anxious person or have high stress levels, coffee might not be for you.
If you have PCOS, endometriosis or any other hormonal imbalance you may need to consider either decreasing your caffeine intake or avoiding it all together. When your body is under stress it releases a hormone called cortisol; this is a normal stress response but what's not normal is extremely high levels of cortisol. As caffeine is a stimulant which can increase the stress response, in a stressed individual caffeine can increase cortisol levels, which can disrupt hormonal balance.
As everyone metabolises caffeine differently (mentioned above), those who are slow caffeine metabolisers may suffer from sleep disturbances. Be mindful and listen to what your body is telling you. If you're having poor quality (broken and easily disrupted) sleep, try avoiding coffee after midday or avoid it all together until you've established a healthy sleep routine. We are all individuals, and being aware of how caffeine affects you is something you may need to be more in-tune with.
Caffeine can affect your body's absorption of minerals such as iron, magnesium, calcium which for some can lead to deficiencies, particularly in iron deficiency anemia.
Eating and exercise aren't the only things that can impact our weight and health. Physical and emotional stress also affects our nervous system and can tip it into the 'fight or flight' mode, causing weight gain. In an already stressed individual whose cortisol and adrenaline levels are high, excesses caffeine intake will further increases these hormones, resulting in fat storage (due to the perceived stressed response the body is under). If this sounds like you limiting coffee to one or none a day could be worth while.
Potential benefits from drinking coffee
Caffeine increases blood flow and circulation to your muscles, and given it's a stimulant it can give you that extra push at the gym! Some studies show that drinking caffeine pre-workout can not only enhance your performance but also help you to burn more calories. Caffeine also increases activity in the brain by blocking a neurotransmitter called adenosine and increasing the release of other neurotransmitters such as dopamine and norepinephrine. This helps to reduce tiredness and makes us feel more alert.
Some studies have shown that regular coffee drinkers have a lower risk of Alzheimer's, Parkinson's disease and risk of dementia in old age.
While of course you should increase your intake of whole foods such as vegetables and fruit to increase your antioxidants, coffee might be another great addition if you can tolerate it well.
Some studies show that coffee may help improve blood sugar control and reduce weight by drinking 1-2 cups per day.
Some studies show that coffee can decrease the risk of cirrhosis and chronic hepatitis C in individuals with chronic liver disease.