What Are the Health Effects of Drinking Coffee Daily?

Here are several responses from industry professionals:

A. Regarding "Can't function without coffee, no coffee no brain"

This saying has been around for years, and you're not alone in this habit.

I've explained the pros and cons of coffee many times before, but now I basically won't talk about how many benefits or harms coffee has anymore. The only thing I want to say is that coffee is just an ordinary beverage, no different from tea. How many years have humans been drinking these beverages? Regardless of whether side effects exist or what they are, at least so far, these two remain the two main beverages second only to (pure) water.

Moreover, smoking is harmful to health - this has reached consensus, yet we don't see everyone quitting smoking.

Don't waste your time on such issues. If you like it, drink it. I recommend controlling it to under 3 cups per day, but I think as long as you don't drink to the point of physical discomfort, it's not considered excessive.

B. Side Effects

One is emotional, and the other two are physiological.

1. Making things worse when nervous

Caffeine helps improve alertness, sensitivity, memory, and concentration. However, drinking more coffee than you're accustomed to consuming can produce effects similar to consuming the same dose of stimulants, causing nervousness. For people prone to anxiety disorders, caffeine can worsen symptoms such as sweaty palms, heart palpitations, and tinnitus.

2. Exacerbating high blood pressure

Because caffeine itself has pain-relieving effects, it's often combined with other simple pain relievers in compound formulations. However, long-term excessive consumption, especially if you already have high blood pressure, will only make your condition more severe. Since caffeine alone can raise blood pressure, when combined with emotional stress, it creates a dangerous multiplicative effect. Therefore, people at high risk for hypertension should particularly avoid consuming caffeinated beverages during times of high work stress. Some people who have been drinking coffee for years think they've become immune to caffeine's effects, but this is not the case. A study showed that after drinking one cup of coffee, blood pressure elevation can last up to 12 hours.

3. Inducing osteoporosis

Caffeine itself has good diuretic effects. If you drink coffee long-term and in large quantities, it can easily cause bone loss, which has adverse effects on bone mass preservation. For women, this may increase the threat of osteoporosis. However, the premise is that you already lack sufficient calcium intake in your regular diet, or you're not physically active often, plus post-menopausal women experiencing calcium loss due to lack of estrogen. Only when these conditions are combined with large amounts of caffeine might it pose a threat to bones. If you can enjoy it in reasonable quantities, you can still avoid throwing out the baby with the bathwater.

C. Personal Experience with Coffee Side Effects

As for what side effects coffee has, since I haven't researched it, it's hard to express, and I don't want to search online for standard answers to placate you. So let me just talk about what side effects it has for me personally, with a case study:

One afternoon I was drowsy, but I had a meeting in 40 minutes. If things continued this way, I would definitely fall asleep at my desk during the meeting. So I drank a cup of coffee, and sure enough, 5 minutes later I was refreshed and energetic, bouncing around as if struck by lightning, smiling at everyone I met... Then that evening, while sitting with friends, I drank another large cup. The result was that I absolutely couldn't sleep that night. I couldn't sleep even with my eyes closed, so I finally got up to watch a movie until after 3 AM, finally dozing off for a bit. The next day, I went to work with dark circles, eye bags, and a face full of acne...

It seems this incident could make it onto an embarrassing stories website, but although I'm easily affected by caffeine, I really love drinking coffee, especially sweet coffee - it's truly irresistible. Recently I haven't dared to drink it, only having a little when my craving becomes unbearable.

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