If caffeine burns fat then why does coffee increase insulin resistance?
You can check the answer of the people under the question at Quora “does coffee cause insulin resistance“
If caffeine burns fat then why does coffee increase insulin resistance?
You can check the answer of the people under the question at Quora “does coffee cause insulin resistance“
A growing body of research suggests people with type 2 diabetes react to caffeine differently. It can raise blood sugar and insulin levels for those with the disease.
One study looked at people with type 2 diabetes who took a 250-milligram caffeine pill at breakfast and another at lunchtime. That’s about the same amount as drinking two cups of coffee with each meal. The result: Their blood sugar was 8% higher than on days when they didn’t have caffeine. Their reading also jumped by more after each meal.
Caffeine may lower your insulin sensitivity. That means your cells don’t react to the hormone by as much as they once did. They don’t absorb as much sugar from your blood after you eat or drink. This causes your body to make more insulin, so you have higher levels after meals.
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When consumed in moderation, black coffee should not break your fast. In other words, having some coffee won’t kick you out of ketosis or a fat burning state. This is usually true as long as you are a healthy individual who hasn’t been diagnosed with diabetes and who metabolizes coffee quickly (there are gene variants that cause slow clearance of coffee from the body).
Caffeine in coffee, however, can temporarily raise levels of stress hormones like cortisol and epinephrine. These can in turn raise your blood glucose levels by signaling your liver to create new glucose molecules from proteins and fatty acids. Stress hormones can also temporarily block glucose uptake into your muscles (although exercise can help).
Overall, moderate coffee intake is unlikely to raise your fasting blood sugar levels enough to dampen or delay ketone body production or ketosis. You won’t have to worry about black coffee breaking your fast, especially if you isolate your consumption to the morning and don’t drink coffee continuously throughout your fast.
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Some studies suggest that drinking coffee — whether caffeinated and decaffeinated — may actually reduce your risk of developing type 2 diabetes.
If you already have diabetes, however, the impact of caffeine on insulin action may be associated with higher or lower blood sugar levels. For some people with diabetes, about 200 milligrams of caffeine — or the equivalent of one to two 8-ounce (240-milliliter) cups of plain, brewed coffee — may cause this effect.
Caffeine affects every person differently. If you have diabetes or you’re struggling to control your blood sugar levels, limiting the amount of caffeine in your diet may provide a benefit.
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The jury is still out on the relationship between coffee and type II diabetes.
On the one hand, epidemiological studies strongly suggests that regular coffee consumption—regular or decaf—reduces the risk of diabetes.
But other clinical studies seem to show that caffeine may lower your insulin sensitivity, meaning that your cells don’t react to insulin as much as they once did, reducing blood sugar control.
This seems to suggest that may compounds in coffee other than caffeine that reduces the likelihood of diabetes while it is probably the caffeine that affects insulin resistance. But more research is really needed.
To the other part of your question: caffeine can increase metabolism, at least in the short run, which means your body will burn calories more quickly and it seems to be fat metabolism that is most affected.
However, after a while caffeine users become tolerant of the drug, and its effects on fat metabolism are greatly reduced or disappear.
The two processes, effects on insulin resistance and increase in metabolism would seem to be caused by different mechanisms and maybe even by different compounds in coffee, so they well may be unrelated.
Stay tuned, though for more research.