Diet, Gut Microbiota, and Vitamins D + A in Multiple Sclerosis

Area of Science:

• Nutrition science
• Microbiology
• Immunology

Background:

• Low-grade inflammation is central to chronic inflammatory diseases like multiple sclerosis.
• Diet, gut microbiota, and vitamins D and A are key effectors influencing inflammation.
• Western diets can promote inflammation and gut dysbiosis, impacting the gut-brain axis.

Purpose of the Study:

• To investigate the interplay between diet, gut microbiota, and vitamins D and A in the context of multiple sclerosis.
• To elucidate the mechanisms by which dietary components influence inflammation and host-microbe interactions.
• To highlight the role of nutrients and specific vitamins in managing chronic inflammatory conditions.

Main Methods:

• Analysis of dietary components' pro- and anti-inflammatory effects.
• Assessment of diet's impact on human metabolism (metabolome) and gut microbiota composition.
• Evaluation of vitamin D and A's role in modulating inflammation and receptor binding.

Main Results:

• Hypercaloric, high-animal-fat Western diets induce dysbiosis and intestinal inflammation, leading to neuroinflammation.
• Vegetarian diets rich in fiber promote gut eubiosis and a healthy condition.
• Optimal vitamin D levels (>30 ng/ml), achieved with cholecalciferol, require vitamin A for anti-inflammatory action.

Conclusions:

• Dietary nutrients, including fiber, play a critical role in managing low-grade inflammation in chronic diseases.
• Gut microbiota mediates the anti-inflammatory effects of nutrients, with diet-induced microbial changes impacting disease progression.
• Restoring vitamin D levels and ensuring adequate vitamin A intake are essential for mitigating inflammation.