Is Your Coffee Habit The Reason You Might Be Gaining Weight?

Your daily brew could be working against you!

can coffee make you gain weight
Image: iStock

I remember the first time I ever submitted a meal diary, to my personal trainer at the time. As I anxiously awaited his feedback (and judgement). I wondered what he was going to scold me for first—the toast I ate for breakfast every morning? The museli bar I snacked on every afternoon? The pizza I ate religiously every Friday night? But to my surprise, his first comment read: “You’re drinking 3 coffees a day? Why?” He explained that this was probably the biggest thing stalling my weight loss. I was flummoxed. I thought coffee was practically a health food, what with all the longevity-boosting antioxidants and all. Plus, I was having it with almond milk!
But turns out, my trainer was onto something. While caffeine does indeed have its health benefits (drinking lots of it has been found to reduce your risk of conditions like type 2 Diabetes and Parkinson’s disease) overdoing it on the java can impact weight loss—and even make you gain weight! Here’s why.

Why drinking too much caffeine can stall weight loss

The average person drinks around about 300 milligrams (mg) of caffeine daily. This is more than enough to have a negative impact on your blood sugar levels, which in turn spikes your insulin.
“One thing this hormone is very good at storing is fat in your midsection,” says Dr. Vincent M. Pedre. “Keeping insulin elevated can make your cells less sensitive to its ‘signal’; this is called insulin resistance. To lose weight and keep it off, you want your cells to be the complete opposite—insulin sensitive.
Short-term disruptions in insulin sensitivity and blood glucose levels, which lead to weight gain in the form of increased abdominal fat, then deposits a feed-forward mechanism in your abdomen that propels the forces of weight gain, even as blood sugar levels may have normalized with long-term caffeine consumption.”

drinking coffee weight gain
Image: iStock

While the effects are obviously going to more dramatic if you chug seven cups of coffee, some people are affected by as little as two cups. It all depends on how quickly your body metabolises caffeine. For slow metabolisers, the caffeine hangs out in their system for longer, and is more likely to spike their blood sugar levels and cause health problems. Meanwhile, fast metabolisers can absorb the antioxidants more quickly without the negative effects.
Then, there’s the fact that caffeine can put added pressure on your adrenal glands. When your adrenals are in overdrive, it floods your body with the stress hormone, cortisol. When your body is in this ‘flight or fight mode’, it can prevent your digestive system from working as it should  and increase your appetite. Long term, it can also encourage your body to hold onto more belly fat.

Do you need to stop drinking coffee to lose weight?


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The good news is, you don’t necessarily have to ditch your morning brew to shed or maintain your weight. It’s all about being smart about how you consume it. For most people, a good rule of thumb is to cap your consumption at one or two cups, and never after 2 pm. You also want to pay attention to how you’re having your coffee—if you’re having it with full-fat milk and a spoonful of sugar, that’s obviously not going to do you any favours in terms of the calories.
You can take a DNA  test to determine how sensitive you are to coffee and how quickly you metabolise it. If you’re a slow metaboliser, you may want to limit your consumption to one per day, or cut it out completely. The same goes for if you’re going through a particularly stressful or chaotic time. The last thing you want to do is pump your body with caffeine when your adrenals are already working overtime—it will just make you more anxious and may lead to weight gain. You may want to look at switching to mushroom coffee (which has calming adaptogens and blood sugar stabilising mushrooms) or one of these coffee alternatives.

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