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Formulated by Dr. Nigh:

Supplements for SIBO and Immune Support

Supporting healthy sulfur metabolism and optimal immunity.

Immersion Health now offers four supplements that are available nowhere else! Each was formulated by Dr. Nigh and is a result of literally hundreds of hours of research he has done on the topics of SIBO (small intestine bacterial overgrowth), digestive health, and immune support related to protection against viral infections. These are available for purchase in our clinic medicinary, or can be shipped.

There is now widespread awareness of the importance of maintaining a strong immune system to optimize resistance to viral and bacterial infections. CX21 contains a combination of ten nutrients intended to strengthen the body’s antimicrobial defenses. During illness or times of high exposure risk, it is recommended to take 3 capsules twice daily with food. For general prevention, 3 capsules once daily with food is a standard dose.

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Impaired sulfur metabolism can be the underlying cause of a wide range of symptoms and conditions that range from SIBO, IBS, reflux and bloating, to hot flashes, dermatitis, headaches, brain fog, and many others. HSX is formulated with nutrients needed to fully metabolize dietary sulfur and prevent the excess formation of hydrogen sulfide gas. In the first month often a loading dose of 2 capsules twice daily is recommended, typically taken with lunch and dinner. After that, 1 capsule twice daily.


Gas and bloating are among the most common symptoms associated with SIBO and other gastrointestinal disorders. GBX is formulated with nutrients to not only provide symptomatic relief but to help create the conditions to address the underlying cause of the symptoms. It is commonly used in conjunction with HSX, two capsules twice daily with food if symptoms are severe, otherwise one capsule twice daily.


Some people with an intolerance of sulfur-containing foods struggle with bloating even hours after they’ve eaten. This can be caused by bacteria that metabolize the sulfur within the mucus lining of the digestive tract and convert it into hydrogen sulfide gas. MCX is formulated with a combination of botanical extracts shown to suppress the mucinase enzyme bacteria use to carry out that conversion. Take 1 capsule on an empty stomach at bedtime. An additional capsule can be taken between meals during the day if bloating persists. If the supplement causes any feeling of heartburn, take it with meals.


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