These things — bacterial microbiomes — live on our skin and in our guts, so, how can we maintain a healthy balance? Medical News Today explains that maintaining a healthy gut microbiome reduces the body's inflammatory reaction, including common skin concerns.

"There is a clear link between skin inflammation and changes in the gut microbiome due to food intake," according to Dr. Samuel Hwang, who discussed the topic with the outlet. He explained that a diet too heavily skewed toward unhealthy fats and sugar can lead to skin and joint inflammation issues. It's important to note — according to Dr. Mike Hansen — that when harmful bacteria take over the gut, they can break down the lining and cause chemical components to leak out. This triggers inflammatory responses throughout the body, which can include skin issues like acne or even eczema (via The Secret Life of Skin).

But Dr. Hwang's research shows it's not difficult to reverse these issues through diet change, advice echoed in a feature by The Washington Post. With this in mind, you can improve the balance of good bacteria in your gut by reducing sugar and unhealthy fat intake and increasing the variety of veggies, nuts, and seeds you consume. Remember, good bacteria thrive on fiber-dense foods. Now, you may be wondering, which foods are the most beneficial in terms of skincare? Kale may just be your answer.