Can you drink coffee before a cholesterol blood test?

In this text, we will talk about whether or not to drink coffee before having a cholesterol blood test, as well as the types of tests that require fasting. We are also going to talk a little about having coffee for breakfast, as well as whether or not coffee breaks the intermittent fasting.

Can you drink coffee before a cholesterol blood test?

No, you cannot have coffee, even sugar-free, before a blood test. Any food, with the exception of water, when ingested, interferes with the test results because they modify some biochemical dosages.

This is because normally 1 hour after we wake up, our body experiences a spike in cortisol, which is also responsible for keeping us awake and alert.

The caffeine present in this drink causes the level of this hormone to rise in the body, in addition to being boosted in the increase of Adrenaline, Noradrenaline and GH, especially in stressful situations.

These and other changes can “make up” the results of your exams, therefore, it is not recommended to consume coffee during the fasting period, when it is necessary!

What can I eat before having a blood test?

The food or fasting required will depend on the type of blood test. The healthcare provider ordering the test will tell you if you will need any special preparation.

In some blood tests you will be allowed to eat normally, while in others where fasting is required, you will be warned in advance not to eat or drink anything other than water.

The truth is that any food, if consumed in excess in the days before the exam, will cause you to have a higher level of certain substances in the body, which can interfere with the results.

For example, if you eat a lot of potassium-rich foods, such as bananas or sweet potatoes, the test will indicate more potassium in your blood.

What are the blood tests that require fasting?

The blood tests that require fasting are the analysis of blood iron levels, used to diagnose conditions such as anemia, which requires a 12-hour fast to be performed. And other tests.

Your doctor may even ask you to avoid alcohol, certain nutritional supplements, or medication before the test. But as a rule you can take them normally.

What are the blood tests that do not require fasting?

There are many blood tests that do not require fasting, such as a pregnancy test. Fasting is also not necessary for many routine blood chemistry tests. For example, tests that measure kidney, liver, and thyroid function can be performed at any time of day.

Is it recommended to drink black coffee for breakfast in the morning?

We know that drinking that strong coffee right after waking up is delicious and gives a lot of energy. However, is it really healthy to consume the drink in the first few minutes of the day?

Steve Miller, postdoctoral fellow in Health Sciences at Bethesda University, indicated, after studies, that the secretion of cortisol, one of the hormones that makes us more alert, is greater in the morning. 

This means that we already have more energy naturally when we wake up, and by drinking coffee to intensify this, we end up more tolerant to the effect of caffeine.

But take it easy! You don’t need to skip your morning coffee, ok? The tip to enjoy even more the benefits of this delicious drink is to eat something before drinking it and/or wait a few hours for breakfast in the morning.

Does coffee break intermittent fasting?

When we want to analyze whether coffee breaks intermittent fasting, it is important to remember that there are several models of this type of diet, which determine different durations for the feeding window and for the fast itself.

Therefore, to find out if coffee can be part of the fasting method you use or wish to adhere to, talk to the nutritionist who guides you.

After all, staying 16 hours, 24 hours, whatever your method, without eating as in intermittent fasting, can be complicated and even harmful for people who have more delicate or fragile health.

Overall, water is always the best beverage choice for the amount of time a person is eating during intermittent fasting. However, pure coffee, green tea, black tea and herbal tea may also appear in this fasting period.

In fact, black coffee can even contribute to appetite control. So, consequently, it would help to get through the morning fast with less difficulty. Take the opportunity to know everything that breaks intermittent fasting to follow correctly.

On the other hand, you should not add cream, milk or sugar to these drinks. In other words, coffee accompanied by these ingredients breaks intermittent fasting.

Also, although it is okay to drink plain coffee while on an intermittent fast, try not to overdo it. Too much coffee can make you nervous and anxious. Especially if you’re sensitive to caffeine. Drinking coffee late in the day can also affect sleep quality.

Finally, when drinking coffee on an empty stomach, caffeine enters the bloodstream more quickly than it would if you had just eaten and had a full stomach.


It is not recommended to drink coffee before the blood test as it can interfere with the tests. Also, during intermittent fasting, care should be taken with excess caffeine.


Hi, I am Charlotte, I love cooking and in my previous life, I was a chef. I bring some of my experience to the recipes on this hub and answer your food questions.