Decaf coffee and your health: what the science actually says (not what your colleague who read something once says)

Your colleague has opinions about decaf. They involve chemicals, or the pointlessness of it, or something they read that one time. Your colleague has probably also at various points declared that fat is fine, that carbs are the real enemy, that you should be doing intermittent fasting and that the key to good sleep is no screens after 8pm, which they announce while looking at their phone.

We are not your colleague. We sell only decaf and we have spent considerable time reading the actual research. Here is what it says, stripped of the mythology and the malfunctioning spin dryer energy that surrounds caffeine discourse.

First, a quick word on what decaf actually is

Decaf coffee is regular coffee with the caffeine removed. At least 97 per cent of it by law, and up to 99.9 per cent with Swiss Water or CO2 processing. Everything else, the antioxidants, polyphenols, chlorogenic acids, the taste, the smell, the ritual of the thing, remains substantially intact. The stuck-in-the-past anti-decaf argument that all the health benefits live in the caffeine is simply not supported by the evidence. The same helpful compounds are found in both regular and decaf coffee. You get all the benefits and can drink considerably more of it without shaking like a malfunctioning spin dryer.

The five things the science actually shows

1. Decaf may reduce the risk of type 2 diabetes

Large-scale studies have found an association between coffee consumption and reduced risk of type 2 diabetes. For a long time this was attributed to caffeine. Then researchers looked at decaf separately and found the same association. The protective effect appears to come from coffee’s polyphenols and chlorogenic acids rather than from caffeine, which means decaf gets the benefit without the physiological cost of the stimulant. Your pancreas, a quiet and underappreciated organ, would like you to know it appreciates this.

2. Decaf is significantly better for sleep, anxiety and mood

Caffeine has a half-life of five to six hours. A cup of regular coffee at 3pm is still circulating at 9pm and still active at midnight. Research in General Hospital Psychiatry found that caffeine can trigger panic attacks in 51 per cent of people with anxiety disorders who consume it. Removing the caffeine removes the sleep disruption, the anxiety amplification and the cortisol spike that regular coffee produces. The ritual of a warm drink in the evening, which decaf gives you without any of the physiological interference, has genuine psychological benefit. This is not woo-woo. This is neuroscience.

3. Decaf has nearly the same antioxidant levels as regular coffee

Coffee is the largest single source of antioxidants in the Western diet, which says as much about the Western diet as it does about coffee but is nevertheless a remarkable fact. Decaf retains approximately 85 to 100 per cent of regular coffee’s antioxidant content depending on the decaffeination method used. If you have been drinking caffeinated coffee for the antioxidants, you can switch to decaf without any meaningful consequence on that front whatsoever.

4. Decaf is less acidic and better for reflux and heartburn

Coffee is acidic. Caffeine additionally relaxes the lower oesophageal sphincter, which is the valve that keeps stomach acid where it belongs. The combination of acidity and sphincter relaxation is the mechanism behind coffee-triggered heartburn and gastroesophageal reflux. Decaf removes the sphincter-relaxing compound while also being somewhat less acidic than regular coffee. For the estimated 20 per cent of UK adults who experience regular heartburn, this is not a trivial distinction. If your current relationship with regular coffee involves antacids, this is worth knowing.

5. Decaf may reduce the risk of cardiovascular disease

The relationship between coffee and heart health is complex and has been studied extensively. The current evidence suggests that moderate coffee consumption, including decaf, is associated with reduced rather than increased cardiovascular risk in most people. For those with a family history of heart or circulation issues, or those with high blood pressure, decaf removes the short-term blood pressure spike that caffeine produces while retaining the beneficial polyphenols associated with reduced cardiovascular risk. A large meta-analysis covering over 500,000 people found that coffee drinkers had a 28 per cent lower risk of dying from chronic kidney disease. Decaf drinkers were included in those numbers.

The one thing decaf is not

A medical treatment. We are not doctors. Nothing in this post is medical advice. If you have a specific health condition and you are wondering whether decaf is appropriate for you, speak to your GP, who will tell you the same things this post says but in a slightly more formal register and without the spin dryer metaphor.

What decaf is, is coffee without the bit that causes the problems for the large number of people for whom caffeine causes problems. It is not a loss, a medical punishment or an admission of defeat. It is, if anything, coffee getting on with being excellent without dragging caffeine’s complications along behind it.

Frequently asked questions

Is decaf coffee actually good for you?

Yes. Decaf retains virtually all of coffee’s antioxidants and polyphenols, which research associates with reduced risk of type 2 diabetes, liver disease and cardiovascular disease. The health benefits of coffee as a category do not require caffeine to function. Removing the caffeine also removes the sleep disruption, anxiety amplification and blood pressure spikes associated with regular coffee.

Does decaf coffee have any side effects?

Decaf coffee is extremely well tolerated by most people. Those with very sensitive stomachs may notice some mild acidity, though decaf is less acidic than regular coffee. People with severe caffeine sensitivity should note that decaf contains trace amounts of caffeine, typically 2 to 5 mg per cup, which is well below the level likely to cause any effect in most people.

Is decaf coffee better for anxiety?

For people whose anxiety is exacerbated by caffeine, yes significantly. Research shows caffeine can trigger or worsen anxiety and panic disorder. Decaf removes the stimulant while keeping the warm, comforting ritual of a hot drink, which itself has genuine psychological benefit. If caffeine makes you anxious, decaf is not a compromise. It is the correct cup of coffee.

Can decaf coffee help with sleep?

Decaf does not disrupt sleep the way regular coffee does. Research published in Sleep Medicine found that caffeinated coffee at 7pm decreased total sleep time, reduced sleep quality and delayed melatonin onset. Decaffeinated coffee showed none of these effects. Switching to decaf in the afternoon and evening is one of the most straightforward evidence-based interventions for improving sleep quality.

Does decaf coffee have the same antioxidants as regular coffee?

Yes, substantially. Decaf retains approximately 85 to 100 per cent of regular coffee’s antioxidant content depending on the decaffeination method. Coffee is the largest source of antioxidants in the typical Western diet. Switching to decaf does not meaningfully reduce your antioxidant intake from coffee.

Browse the full I Love Decaf coffee range, decaf tea and naturally caffeine-free herbal and fruit infusions. All the ritual. None of the spin dryer.