In a review conducted by Henderson, E. (2021), she evaluated the effects of diet on gut and skin health. The increasing prevalence of a western diet is causing rapid changes to gut biology and function, leading to inflammatory processes. A diet rich in sugar and fat leads to an imbalance in the gut's microbial culture and may contribute to inflammatory skin diseases such as psoriasis.
There is a clear link between skin and joint inflammation, and changes in the gut microbiome when starting a western diet is marked. Food is one of the main changeable factors when it comes to gut microbial balance, and high fat/high sugar foods can upset this balance and stimulate an inflammatory response. It was discovered that those suffering with psoriasis experience inflammatory episodes when they are exposed to a more westernised diet.
A very positive outcome is that this inflammatory response is entirely reversible, and can have very fast results when that western diet is replaced by a more balanced one. This shows the diversity and reactivity of gut micro bacteria, so look after it! It is never too late to modify lifestyle behaviours; eat better, exercise regularly and improve your quality of sleep.