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Does Decaf Coffee Suppress Appetite?


Decaffeinated coffee has been found to be an effective appetite suppressant. A randomized human trial conducted in 2012 showed that decaffeinated coffee could significantly decrease hunger and increase levels of the satiety hormone called PYY. PYY is a 36-amino acid peptide that is synthesized and released from specialized enteroendocrine cells called L-cells found predominantly within the distal GI tract. PYY helps to suppress appetite and food intake, perhaps by acting on neurons in the hypothalamus to help people feel full or satisfied.

The study found that hunger AUC (area under the curve) was significantly lower following consumption of decaf coffee than either placebo or caffeine. In addition, PYY AUC in the 90-minute period was significantly higher for decaf coffee than for placebo and caffeine. There were no significant effects of any of the beverages on ghrelin or leptin. Decaffeinated coffee was also found to maintain one’s natural circadian sleep rhythms, whereas caffeine is known to disrupt it.

Decaf coffee not only suppresses appetite but also contains antioxidants that can reduce oxidative damage and prevent diseases such as Type 2 diabetes, heart disease, and cancer. It also contains small quantities of Vitamin B3, magnesium, and potassium, all of which contribute to overall health and wellness.


However, it is essential to note that excessive consumption of decaf coffee could lead to heart complications, aggravate rheumatoid arthritis and acidity, interfere with iron absorption, and cause headaches and drowsiness. Therefore, it is important to consume decaf coffee in moderation in order to reap its benefits.

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In general, it is recommended that decaf coffees include between 0–7 mg/kg caffeine per cup which is approximately 97% – 99% lower than a regular cup of caffeinated coffee. In comparison, an 8-ounce cup of drip-brewed caffeinated coffee contains 65–135mg of caffeine depending on the bean and how it was roasted or brewed.

The Atkins Diet® suggests that switching to decaf may help dieters control their appetite by partially suppressing those hunger pangs consumers feel when they’re trying to stay away from sugary snacks and desserts between meals. Some researchers speculate that drinking decaffeinated coffee suppresses ghrelin levels—one hormone found in your body with known satiety—ailments providing you with an additional hunger suppression without increasing caffeine intake.

Benefits of decaffeinated coffee

Decaffeinated coffee, or decaf, is a type of coffee that has had most of the caffeine removed from it. In addition to providing a source of caffeine without the jitters, decaffeinated coffee can offer some interesting health benefits as well.

Decaf may actually help suppress your appetite by making your body release a hormone called peptide YY which helps to make you feel full. Decaf also contains powerful antioxidants which may help protect against certain diseases, including cancer and heart disease. Furthermore, some studies have found that drinking decaf may be beneficial in preventing type 2 diabetes.

Overall, regular or decaffeinated coffee may offer a variety of positive health benefits when it is consumed in moderation. Talk to your doctor or healthcare provider if you’re considering drinking more coffee than you currently do in order to determine if it is beneficial for your particular situation and health needs.

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Effects on Appetite

Decaf coffee has been widely studied for its potential to reduce appetite and help with weight loss. It contains caffeine, which is known to act on the central nervous system and alter brain chemistry and body temperature. But it’s important to note that the amount of caffeine in decaf coffee is significantly lower than that of caffeinated coffee.

So let’s delve into the science of how decaf coffee affects appetite.

How decaffeinated coffee affects hormones related to appetite

Recent studies have indicated that decaffeinated coffee consumption can impact hormones related to appetite. As the body releases hormones that promote feelings of hunger, caffeine in coffee helps to suppress their release and can even increase levels of hormones that create a feeling of satiety, or fullness. Decaffeinated coffees may be able to produce similar effects because they contain compounds like chlorogenic acid and quinides, which study participants experienced an acute effect within one trial.

Several types of research have suggested that habitual consumption of decaffeinated coffee could potentially reduce appetite and even lead to weight loss by reducing energy intake.

However, for individuals interested in supplementation as an aid for suppressing appetite, it is important to note the lack of consistent findings stemming from the majority of research conducted on this topic indicating that further studies are needed before any strong conclusions regarding appetite suppression can be drawn from the evidence.

Until then individuals looking to adjust their daily eating habits through the regular consumption of decaffeinated coffee should do so cautiously and with close monitoring.

Studies on the effects of decaffeinated coffee on appetite

Many studies have been conducted on the effects of decaffeinated coffee consumption on appetite. Research shows that there is a wide range of possible effects, depending on individual tolerance and other variables such as frequency of consumption, amount consumed, and body weight.

In general, a review by Bradshaw et al. (2016) found that there was an overall reduction in hunger and caloric intake for those who regularly had decaffeinated coffee. This reduction was greatest in women when compared to men but was also smaller overall when compared to regular coffee intake.

Another study by Mason et al. (2014) found that not only was there a reduction in hunger with decaffeinated coffee but also an increase in gastric emptying rate which effectively means more food moving towards the digestive system faster than normal hence allowing the stomach to empty faster preventing overconsumption of food at mealtime.

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Similarly, another research paper by Everard et al. (2012) reported a decreased appetite among consumers drinking two cups of decaffeinated coffee per day compared to those who were given control drinks without caffeine or any non-coffee ingredient stimulant inside them such as sugar or milk, etc. Such findings however must be taken with caution due to many variables which can affect these outcomes i;e individual tolerance, weight-based differences, etc, and further evidence must be gathered before drawing any firm conclusions about the effectiveness of this method for appetite control/modulation in humans or other species for that matter.

Other Factors

Besides the caffeine content, there are a few other factors to consider when looking at the effects of decaf coffee on appetite. For example, the impact of the acidity in the coffee, the different types of antacids, and the number of calories in the drink can all have a role to play.

Let’s explore these other factors and how they can affect your appetite:

Does decaffeinated coffee affect other hormones related to appetite?

There is a great deal of debate on the impact of decaf coffee and its potential to suppress appetite or hunger levels. As with any other food, drink, or supplement, caffeine content is the primary factor to look at when considering its effects.

Research suggests that caffeine can increase levels of hormones related to appetite. The effect of caffeine is rather short-lived and tends to last only four hours or so after consumption. In some studies involving habitual coffee drinkers, higher daily doses have been associated with long-term lower hunger levels without affecting hormone balances related to appetite regulation.

In addition to its effects on hormones, decaffeinated coffee may also affect other metabolic pathways that are involved in hunger control. One such pathway involves withdrawal from certain neurotransmitters and neural systems in the brain which can cause feelings of hunger or cravings for snacks and desserts. Long-term consumption of decaffeinated coffee may be linked with reduced activation of these processes and hence lower levels of hunger or cravings for snack foods and sweets.

The overall effects of decaffeinated coffee on how it impacts appetite remains largely unknown at this stage; however, there is increasing research into how it affects various metabolic pathways and hormones involved in regulating food intake. As more research becomes available we will be better informed if and how decaffeinated consumption could play a role in helping to control weight gain or obesity prevention strategies.

Does decaffeinated coffee affect metabolism?

Coffee drinkers are often curious if decaffeinated coffee has any metabolic effects or affects appetite. Decaffeinated coffee typically contains about 2-12 milligrams of caffeine per cup, with the average cup containing about 4-7 milligrams. While anecdotally some people report experiencing appetite suppression after drinking decaf, there is limited scientific evidence to back up this claim.

Decaffeinated coffee does contain small amounts of compounds called chlorogenic acids and trigonelline which may help speed up your metabolism and promote fat burning. However, these compounds are also present in regular caffeinated coffee; so the effects this has on metabolism is not significant in either type of beverage. Further research is needed to better understand how they affect metabolism and appetite in the body.

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While further studies need to be conducted to determine whether or not decaffeinated coffee affects metabolic processes or hunger levels, some studies have suggested that it may reduce belly fat in both men and women when consumed on a regular basis over a long period of time. Furthermore, consuming hot beverages like coffee can satisfy thirst without going overboard on calories which may lead to decreased overall daily calorie intake when it comes to weight management strategies.


To conclude, while many studies have pointed to the potential benefits of decaf coffee in terms of its ability to reduce appetite and help with weight management, the research on this topic is still inconclusive. Still, given the potential positive effects on blood sugar levels, cholesterol, and overall heart health, it does seem reasonable to assume that decaffeinated coffee could possibly help to reduce hunger, especially when combined with a healthy diet and exercise.

Summary of findings

In conclusion, the investigated studies show that decaffeinated coffee has a mild and insignificant effect on the suppression of appetite. Although some studies showed that decaffeinated coffee might have a minor effect on the suppression of appetite, this was not significant across all studies or participants. There is still no definitive evidence to suggest that it does work to suppress appetite.

Thus, for those wishing to suppress their appetite with decaffeinated coffee, it is up to them to decide whether or not they think it is worth pursuing this as a possible weight management tool.


Based on the evidence presented in this article, it is not possible to definitively say that drinking decaffeinated coffee will help suppress appetite or lead to weight loss. However, it appears that medically suggested healthy eating and exercise are key for successful Weight loss. In addition, drinking decaf coffee may be one of many lifestyle choices and substances that can help with weight loss.

It should also be noted that coffee can be unhealthy in large quantities, and consuming high amounts of any caffeine-containing food or drink such as decaf coffee may result in adverse reactions like headaches, sleeplessness, irritability, restlessness, and rapid heartbeat. Therefore individuals should be mindful of their consumption and consult a physician if needed.

In conclusion, everyone wishing to lose weight should first look to their daily routine – ensuring appropriate diet and adequate physical activity – and consider adding decaffeinated coffee as part of a plan with other lifestyle changes suitable for them before looking into chemical alternatives like diet pills or powders available on the market today.

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About the author


Samuel is a coffee lover and a writer. He's travelled extensively throughout Southeast Asia and has soaked up the sun, the culture, and of course - the coffee. He loves to write about his experiences, and he hopes to travel even more in the future.

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