Caffeine and GLP-1: Can You Still Drink Coffee?

Your morning coffee probably wasn't the first thing you thought about when starting GLP-1 treatment. But if you're now questioning what belongs in your cup, it's a reasonable place to start.

The research reviewed here does not establish that caffeine blocks GLP-1 or stops GLP-1 medicines working. Small human studies have found mixed effects of coffee on the body's own GLP-1 response, and they did not test whether coffee changes the effectiveness of GLP-1 medication. The more practical question is whether your caffeine intake agrees with you: too much can cause nausea, an upset stomach, jitters and sleep disruption.

For anyone looking to cut back, a lower-caffeine mushroom coffee alternative offers another way to enjoy that morning cup. The reason to consider the swap is reducing caffeine, and not a promise to boost your medication.

What is the difference between GLP-1 and GLP-1 medication?

GLP-1 is a hormone involved in blood glucose regulation. GLP-1 receptor agonists activate the receptors targeted by that hormone. Semaglutide, the active ingredient in Ozempic, helps lower blood glucose by increasing insulin release and reducing glucagon release when glucose is elevated. It also delays stomach emptying.

That distinction matters when reading claims about coffee. A study measuring your body's GLP-1 levels after a drink is answering a different question from a study testing whether that drink affects prescription treatment.

Does caffeine increase or decrease GLP-1?

There isn't a reliable, simple answer that applies to every cup. Coffee contains compounds besides caffeine, so a finding about coffee cannot automatically be credited to caffeine alone.

In a randomised crossover trial involving 15 overweight men, decaffeinated coffee produced a small increase in total GLP-1 at one time point. However, it did not significantly change the overall GLP-1 response during the subsequent glucose tolerance test. The researchers concluded that their findings did not support the idea that coffee acutely improves glucose tolerance through changes in these hormones.

Another crossover study, involving 10 healthy men, found higher active GLP-1 at one time point after both caffeinated and decaffeinated coffee. Yet caffeinated coffee also impaired glucose tolerance under the study conditions. The caffeine dose was 5mg per kilogram of body weight, making the findings difficult to translate directly to an everyday coffee habit.

Taken together, these studies show why a change in GLP-1 alone is not proof of a health benefit. Neither establishes that caffeine helps or hinders GLP-1 medication, and neither tested mushroom coffee.

Can you drink coffee on Ozempic?

Ozempic's prescribing information does not list a specific caffeine interaction or a blanket coffee restriction. That should not be interpreted as proof that every amount suits everyone. Its common side effects include nausea, vomiting, diarrhoea, abdominal pain and constipation.

Separately, the FDA lists nausea and an upset stomach among the effects of too much caffeine. A reasonable practical inference is that, if coffee already unsettles your stomach, it could make the experience of treatment less comfortable. This is a question of overlapping symptoms, rather than evidence that caffeine cancels the medication.

Reflux is another reason to pay attention to your cup. The US National Institute of Diabetes and Digestive and Kidney Diseases identifies coffee and other caffeine sources as possible triggers for some people, and recommends discussing individual triggers with a GP.

Persistent nausea, vomiting or diarrhoea during Ozempic treatment deserves medical advice, rather than simply another change of drink.

Oral semaglutide has different drinking instructions

If you take Rybelsus tablets, timing matters. The manufacturer's instructions say to take the tablet on an empty stomach in the morning with no more than 120 mL of plain water, then wait at least 30 minutes before eating, drinking or taking other oral medicines.

That waiting period includes coffee, decaf and mushroom drinks. Choosing less caffeine does not remove it. Follow the instructions supplied with your specific medicine.

Why consider a low-caffeine mushroom coffee alternative?

Perhaps what you love most about coffee is the pause: a favourite mug, something warm, and five minutes before everyone needs something. You can keep that part while choosing a drink with less caffeine.

Our blends combines organic cacao with seven mushrooms, including lion's mane, reishi and cordyceps, plus spices such as cinnamon, ginger and cardamom. It contains no coffee beans. Its cacao contributes some caffeine, so it is a low-caffeine coffee alternative, rather than a caffeine-free drink.

For someone wanting to reduce caffeine, that's the straightforward appeal: a cacao-and-spice morning ritual with a mushroom blend, without making another regular coffee. The research cited here does not establish that blends like ours increases GLP-1, treats medication side effects or improves weight-loss results.

How to start cutting back on caffeine

The FDA recommends reducing caffeine gradually because withdrawal can be unpleasant. One practical way to do that is to replace one regular coffee with a lower-caffeine option and see how you feel before making another change.

Check the actual product information as you compare drinks. “Decaffeinated” still means some caffeine, and caffeine content varies between products. We list our ingredients and caffeine information on its product page so you can decide whether it suits your needs.

Ready to give your morning cup a different job? Explore Earthrise Original Blend and keep the ritual with less caffeine.

General information only. Follow your prescriber's advice about your medication and symptoms.