Diets like Paleo and Keto can be deficient in fiber and resistant starch, and therefore, low in butyrate if proper dietary guidelines are not followed. When a Paleo diet is properly followed, an individual should be consuming between 9-12 cups of phytonutrient and fiber-rich plant foods including, green plantains, green bananas, sunchokes, artichokes, cooked and cooled potatoes, etc. in order to produce ample levels of butyrate. The problems arise when individuals focus exclusively on animal protein and fat while neglecting these plant foods/fibers.
Nine cups of vegetables contain roughly 72 grams of fiber. Remember, we must also consider the health of the individual's microbiome. This factor will also influence butyrate production.
The ability for your body to synthesize butyrate depends on several factors. Dietary fiber and resistant starch intake are critical, but we also need a plethora of probiotic bacteria in the colon to ferment the fiber that we eat and synthesize it into butyrate, acetate, and propionate (other important SCFAs). The state of the microbiome, the impact of drugs, alcohol, etc. factors into each individual's ability to produce short-chain fatty acids like butyrate.
Chronic overeating via processed, nutrient-void foods high in energy, fat and sugar is the norm amongst the majority of North Americans. This dietary regimen creates a situation where gut health is greatly compromised and therefore, butyrate production is greatly impaired. One cannot go wrong eating a nutrient-dense diet filled with high quality animal protein and colorful, fiber-rich foods.
It is important to note that most studies on butyrate are done via butyrate supplementation. Regardless of whether you are making adequate butyrate in the gut, we don't think you can go wrong by supporting your body with a top-up of butyrate through supplementation. Butyrate supplementation has been shown to support a healthy gut inflammation response, improve gut integrity, regulate the immune system, stabilize mood, and improve the gut/brain axis.