Citrus Peel Power: The Surprising Gut Health Hero

Imagine a world where a simple citrus peel could be the key to unlocking better gut health, reducing fat, and improving overall well-being. It might sound like something out of a health enthusiast's dream, but a recent study by Su, Liao, Lin, Wei, and Tung suggests this dream could be a reality. 

The Discovery

Our story begins with Shiikuwasha, or Citrus depressa (its Latin title), a small, sour citrus fruit often overlooked in favour of its sweeter cousins. Researchers were curious about its potential health benefits, particularly its peel, which is usually discarded. What they found was nothing short of remarkable.

The researchers conducted their study on obese mice, dividing them into groups and giving some of them peel extract. Over time, they monitored changes in the mice’s gut bacteria, fat accumulation, and metabolic health. The results were clear and consistent: the citrus peel extract provided significant health benefits.

Fighting Fat Accumulation. The researchers found that this citrus peel extract significantly reduced lipid (fat) accumulation in the liver and adipose tissues of obese mice. This suggests potential uses of citrus peel extracts in combatting obesity. How did the citrus peel combat fat? By changing the composition of the gut microbiota.

The citrus peel extract promoted the growth of beneficial bacteria like Bifidobacterium and Lactobacillus while reducing harmful bacteria. This shift in gut microbiota composition helps improve gut health, which plays a critical role in regulating fat metabolism. This caused mice fed with the citrus extract to display better metabolic markers. They had lower blood glucose levels and improved insulin sensitivity. In other words, their bodies were better at managing blood sugar, which is crucial for preventing conditions like diabetes.

Antioxidant and Anti-inflammatory Effects. To top it all off, the extract was found to have antioxidant and anti-inflammatory properties. This means it helps protect cells from damage, and reduced inflammation. In doing so, this is likely to reduce the prevalence of diseases such as cancer, and coronary heart disease. 

Bringing It Home: Practical Tips

So, does this mean we should all be adding citrus fruit peel to our meals? Not necessarily.

The lesson here is less about a specific citrus peel extract, and more about the importance of the gut microbiome in causing positive health outcomes. The importance of the gut microbiome on health outcomes such as weight loss and metabolism, immunity and digestion is hard to understate. 

So, how do you foster a healthy gut microbiome? 

1. Eat the right types of fibre. See our Fibre Foundation product for the type of fibre the gut microbiome prefer. Eating the right types of fibre, known as prebiotics, selectively feeds gut microbes (even better than citrus fruit peel).
2. Make it routine. See our blog post on the 5 benefits of soaking oats overnight. Our range of gut friendly oats embed special prebiotic fibres to ensure a your gut microbiome is taken care of as part of your breakfast routine. 
3. Eat fresh fruit & veg. Sprouting your own broccoli seeds, for example, is an easy way to get the freshest veg around. 

References:

Su, Z.Y., Liao, J.A., Lin, C.T., Wei, G.J. and Tung, Y.C., 2024. Citrus depressa peel extract act as a prebiotic to reduce lipid accumulation and modulate gut microbiota in obese mice. Journal of Food and Drug Analysis, 32(2), pp.219-232.