Key Takeaways: 

  • The human microbiome is the bacteria that lives on and in our bodies, mostly in our intestines 
  • Our gut health and skin health are connected 
  • We can improve the health of our microbiome with supplementation 

You’ve heard it before and we’ll say it again: what’s happening inside your body is reflected on the outside, in your skin. But what exactly inside of us is contributing to a healthy or unhealthy Skin Climate? 

The Human Microbiome 

The human microbiome is the entire collection of species that reside within and on our bodies (1). These species mostly reside in our intestines (lower gut), and they work together to provide benefits to one another, which can enormously impact our health. This intricate connection between the gut and skin has led to the term “gut-skin axis” (2) and researchers are increasingly investigating how the gut microbiome influences our skin, as well as other organs including the brain and lungs. 

There’s lots of evidence that the human microbiome may (3): 

  • Produce many nutrients important for human health 
  • Prevent infections 
  • Modify or influences immune response 
  • Is partly responsible for human metabolism 
  • Regulate the balance between health and disease  

Negative changes to our gut microbiome are linked to the development of skin conditions including eczema or atopic dermatitis. The discovery of this connection has led to the idea that improving our microbiome could play a role in skin disease prevention or treatment (2) 

So, how do we improve our microbiome? 

A lot of research has focused on supplementing with probiotics, which are live beneficial gut bacteria that comes in the form of capsules, yogurt or even smoothies/other beverages. The thing is, your diet impacts the effectiveness of probiotics, meaning there must be food available within your gut for them to survive and flourish (4). 

This is where prebiotics come into play.  

Prebiotics are essentially dietary fibers that are not digested, or only partially digested, that are not absorbed through the small intestine, and that are used as food by beneficial intestinal bacteria (3).  

Prebiotics have enormous potential to modify the human microbiome. Many studies have shown that prebiotics significantly increase beneficial bacteria levels and can enhance immune function. Some of these enhanced immune function effects are linked to improved inflammatory skin conditions like acne, eczema/atopic dermatitis, and psoriasis (3).  

In summary, the gut-skin axis and ensuring you have a healthy microbiome is closely tied to your Skin Climate. While probiotics are often highlighted, prebiotics are required for them to flourish. 

Learn more about prebiotics vs probiotics.

  1. Thomas, C. L., & Fernández-Peñas, P. (2016). The microbiome and atopic eczema: More than skin deep. Australasian Journal of Dermatology, 58(1), 18–24. 
  1. Lee, S., Lee, E., Park, Y.M. & Hong, S. (2018). Microbiome in the Gut-Skin Axis in Atopic Dermatitis. Allergy, Asthma and Immunology Research, 10(4): 353-362.  
  1. Markowiak, P., & Śliżewska, K. (2017). Effects of probiotics, prebiotics, and synbiotics on human health. Nutrients, 9(9), 1021. 
  1. Ercolini, D., & Fogliano, V. (2018). Food design to feed the human gut microbiota. Journal of Agricultural and Food Chemistry, 66(15), 3754–3758.