A major side effect of caffeine on your vitamin D levels, a new study says:

If you’re tuned in to the recent conversation about the many benefits of Vitamin D, there is an important update. A new study suggests that if you regularly count on a caffeine boost, that caffeine intake may interfere with your body’s ability to absorb Vitamin D. Here’s what you need to know.

Medical researchers in China and Brazil recently collaborated to conduct a study to be published shortly in the International Journal of Vitamin and Nutrition Research. The study was based on previous research that concluded that caffeine consumption was linked to a decrease in the production of vitamin D receptors.

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To explore this further, this study examined nutritional data collected from more than 13,000 participants in the National Health and Nutrition Examination Survey between 2005 and 2006. Then, adjusting for a number of other health-related variables, they examined the clinical likelihood that vitamin D deficiency is based on caffeine intake.

Indeed, the researchers concluded that the more caffeine individuals drank, the greater their risk of vitamin D deficiency. In the abstract of the study, the authors state clearly: “Higher dietary caffeine intake was associated with [Vitamin D] deficit in a representative sample of the US population.”

It is important to note that the researchers qualify this finding by adding that further research may be needed to determine whether caffeine is actually causes this vitamin D deficiency. At this point, it’s also not clear what the benchmarks were that differentiated healthy caffeine levels from those associated with lower vitamin D levels.

Another question may be how caffeine affects vitamin D levels in older individuals, as the data used in this study was collected from individuals ages 30 to 47.

How do you know if you’re drinking too much coffee? Experts have made a few recommendations to recognize the signs that you are overdoing it.

And, for more of the latest on the power of vitamin D, keep reading: