The vagus nerve controls many involuntary functions essential for survival and health, including heart rate, breathing, and digestion. It also influences the immune system, mood, and reflex actions like swallowing, coughing, and vomiting. It acts as a crucial connection, relaying sensory and motor signals between the brain and the body's major organs.

Vitamins and minerals that support the vagus nerve include
B vitamins, magnesium, vitamin D, and choline. These nutrients are crucial for nerve health and function, with B vitamins supporting nerve health and neurotransmitters, magnesium playing a role in nerve transmission, vitamin D aiding in nerve health, and choline being essential for acetylcholine production.

Key vitamins and minerals for the vagus nerve:

B Vitamins: Particularly vitamins B6 and B12, are important for nerve health and the synthesis of neurotransmitters.

Magnesium: A mineral involved in hundreds of bodily functions, including nerve transmission and muscle function. Low magnesium levels are linked to irregular heartbeats (arrhythmias), such as premature beats or atrial fibrillation. Maintaining adequate magnesium levels can usually prevent these conditions.

Choline: This nutrient is vital for the production of acetylcholine, a primary neurotransmitter for the vagus nerve.

Vitamin D: Adequate levels are essential for nerve health and may help reduce inflammation.

Antioxidants: Vitamins C and E, along with polyphenols found in foods like berries and green tea, help protect nerve tissue from damage.

Key functions of the Vagus nerve:

Cardiovascular regulation: Controls heart rate and blood pressure.

Respiratory function: Regulates breathing.

Digestive system: Manages digestion, gut motility, and the production of stomach acid and other digestive processes.

Immune response: Helps modulate the immune system and inflammation.

Gut-brain axis: Facilitates two-way communication between the brain and the gut, affecting mood and stress responses.

Reflex actions: Controls reflexes such as swallowing, coughing, sneezing, and gagging.

Sensory functions: Provides sensory information from organs, the throat, and the skin behind the ear.

Autonomic nervous system: It is a major component of the parasympathetic nervous system, which governs the "rest and digest" state.

The above stated supplements corrected many issues I used to experience 20 years ago, especially Magnesium for Afib and the others for my stomach issues. So basically, it's a nutritional deficiency that causes malfunctions of the Vagus nerve.

As a 20 + year student of Epidemiological studies of the cranial nerves, this is their conclusion about the Vagus nerve. (Cranial nerve 10).