Does Coffee Deplete Magnesium

Are you a coffee lover? If so, you may be interested in knowing whether drinking coffee affects your magnesium levels.

This is an important question, as magnesium is a vital mineral for health. In this blog post, we’ll take a look at the evidence on this topic and explore how coffee might affect Magnesium levels. Stay tuned to learn more!

How much magnesium do you actually need? 

The recommended dietary allowance (RDA) for magnesium is 420 mg for adult men and 320 mg for adult women.

However, the average American diet only provides about half of the RDA for magnesium. This means that many people are already at risk for magnesium deficiency before they even factor in coffee consumption.

What, exactly, is magnesium?

Magnesium is a mineral that’s crucial to the human body. It’s necessary for more than 300 biochemical reactions in the body, and it’s involved in energy production, DNA synthesis, and muscle contraction, among other things.

Magnesium is found in a variety of foods, including leafy green vegetables, nuts, and whole grains. It’s also available in supplement form.

Why is magnesium deficiency so widespread?

One of the most common deficiencies in developed countries is magnesium deficiency. This is because our diets have changed drastically over the years and we are not getting enough of this vital mineral. There are a few reasons for this:

  • Our soil has become depleted of magnesium due to industrial farming practices.
  • We consume more processed foods which contain little to no magnesium.
  • We drink more coffee and alcohol which can lead to magnesium loss.

With all of these factors at play, it’s no wonder that magnesium deficiency is so common. But what does this mean for our health?

Magnesium is involved in over 300 biochemical reactions in the body and is essential for good health. This includes:

  • Maintaining muscle and nerve function
  • Keeping heart rhythm steady
  • Regulating blood sugar levels
  • Supporting a healthy immune system

So, as you can see, magnesium is essential for many different functions in the body. And when we’re deficient in magnesium, it can lead to a whole host of health problems.

9. Signs You Are Deficient in Magnesium (And What To Do About It)

If you suspect that you might be deficient in magnesium, there are a few signs to look out for. These include:

  • Muscle cramps
  • Fatigue
  • Insomnia
  • Anxiety
  • Depression
  • Osteoporosis
  • High blood pressure
  • Asthma
  • Migraines

If you’re experiencing any of these symptoms, it’s a good idea to get your magnesium levels checked by a doctor. They can order a simple blood test to check your levels and make sure that you’re getting enough of this vital mineral.

Magnesium and Health

Magnesium is a vital mineral for human health. It plays an important role in many bodily functions, including energy production, muscle contraction, and nerve function. Magnesium is also involved in bone health and has been linked to a lower risk of cardiovascular disease and type 2 diabetes.

Despite its importance, magnesium deficiency is fairly common. In fact, studies have shown that up to 80% of Americans do not get the recommended daily intake of magnesium (400-420 mg for adults).

The Best Ways To Boost Your Magnesium

Eating magnesium-rich foods is the best way to ensure adequate intake of this important nutrient.

Some good sources of magnesium include leafy green vegetables, nuts and seeds, fish, and whole grains.

Some people may also need to take magnesium supplements to correct a deficiency. This is especially true for older adults, as magnesium absorption declines with age.

Can drinking too much coffee cause magnesium deficiency?

There is some evidence to suggest that coffee may contribute to magnesium deficiency. This is because coffee can inhibit the absorption of magnesium from the gut. Additionally, coffee may increase the urinary excretion of magnesium.

However, it’s important to keep in mind that this research is limited and more studies are needed to confirm these effects.

Moreover, it’s unclear if the effects of coffee on magnesium absorption are significant enough to cause a deficiency.

At this point, there is no need to avoid coffee if you’re concerned about magnesium deficiency.

However, it may be a good idea to consume coffee in moderation and make sure you’re getting enough magnesium-rich foods in your diet.

Does coffee block vitamin absorption?

Coffee does not seem to significantly affect the absorption of vitamins from the gut. However, one study found that coffee may reduce the absorption of vitamin B6. This is a water-soluble vitamin, so any unabsorbed vitamin B6 will be excreted in urine.

While this finding needs to be confirmed by further research, it’s unlikely that coffee drinking will cause a vitamin B6 deficiency.

This is because the recommended daily intake of vitamin B6 is only 1.3-1.7 mg and a cup of coffee only contains about 0.1 mg of this vitamin.

What supplements should not be taken with coffee?

Coffee can interact with some medications and supplements. For example, coffee can increase the effects of stimulant medications like Adderall (amphetamine) and Ritalin (methylphenidate). Coffee may also reduce the absorption of iron from supplements.

If you take any medications or supplements, it’s important to talk to your healthcare provider about possible interactions with coffee.

Can I take magnesium with coffee?

There is no need to avoid coffee if you’re taking magnesium supplements. However, it’s a good idea to space out your caffeine and magnesium intake by at least 2 hours. This will give your body time to absorb the magnesium before the coffee has a chance to inhibit its absorption.


How do I know if I’m low on magnesium?

If you suspect you may be deficient in magnesium, speak to your doctor. They can order a blood test to check your magnesium levels.

What are the best sources of magnesium?

Magnesium-rich foods include:

Leafy green vegetables, such as spinach and Swiss chard

Nuts and seeds, such as almond and pumpkin seeds

Beans and legumes, such as black beans and kidney beans

Whole grains, such as brown rice and oats

Fish, such as salmon and halibut

Dairy products, such as milk and yogurt

Dark chocolate



I hope you found this information on coffee and magnesium helpful. Remember, coffee may reduce the absorption of magnesium from the gut. However, there is no need to avoid coffee if you’re concerned about magnesium deficiency. Just be sure to consume coffee in moderation and make sure you’re getting enough magnesium-rich foods in your diet.

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About the Author Adam

As a health and fitness writer, Adam combines his two passions—weightlifting and writing. With a creative writing degree under his belt, he spends his mornings lifting weights, his nights putting pen to paper, and eating too many snacks in between.

Health Disclaimer

  • Any products written about is not intended to diagnose, treat, cure, or prevent any disease.
  • Results may vary/may not be typical. 
  • This information does not constitute medical advice and it should not be relied upon as such. Consult with your doctor before modifying your regular medical regime.


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