How to deal with Hydrogen Sulfide SIBO (H2S)

Hydrogen Sulfide SIBO Diet

Generally, a low-sulfur diet is recommended, although it is still questionable whether it truly helps this condition as the research is currently limited. The low-sulfur diet means a reduced intake of foods high in sulfur, such as:

• eggs,
• dairy products (cow/ sheep/goat milk, cheese, yogurt, cottage cheese, etc.)
• red meat,
• dried fruits,
• legumes (beans, lentils, soy)
• Vegetables: cruciferous vegetables like broccoli, cauliflower, cabbage, arugula, daikon radish, horseradish, spinach, split peas, turnip, watercress, etc.
• Certain fruits: grapes, papaya, and pineapple
• garlic, onion, leek

You can always try a low-sulfur diet for a short period, 1-2 weeks, to see if it reduces your symptoms, but it is not a long-term approach.

Supplements and nutrients:

Herbal antimicrobials like oil of oregano may work to help reduce the overgrowth. Oregano oil contains compounds such as carvacrol and thymol, which have been shown to possess broad-spectrum antibacterial activities. These compounds can disrupt the cell membranes of bacteria, leading to their death or inhibition of growth. In the context of Hydrogen sulfide SIBO, oregano oil could potentially help by targeting the specific bacteria responsible for producing hydrogen sulfide gas. By reducing the population of these bacteria in the small intestine, oregano oil may help decrease hydrogen sulfide production, thereby alleviating some of the symptoms associated with H2S SIBO. (6)

It's important to note that while oregano oil has promising antibacterial effects, its use should be cautiously approached. High doses can irritate the gut lining, and it should not be taken for prolonged periods without the supervision of a healthcare provider.

Another great herb is Uva Ursi (bearberry leaf), well-known for its antiseptic and antibacterial properties, particularly in treating urinary tract infections. Its primary active component, arbutin, is metabolized into hydroquinone, a compound with antimicrobial effects. Uva Ursi can exert antibacterial effects and possibly help modulate bacterial populations in the gut, potentially impacting the bacteria responsible for hydrogen sulfide production.

However, it's important to approach Uva Ursi cautiously due to its potent effects and potential toxicity at high doses. Specifically, the hydroquinone produced from arbutin can be toxic, necessitating careful dosing and, ideally, supervision by a healthcare provider. Its use is typically recommended for a short period of time. (7)

Supplements such as bismuth subsalicylate (the active ingredient in Pepto Bismol) can bind to hydrogen sulfide, reducing its presence in the gut. It has antimicrobial and anti-inflammatory properties, making it effective in combating certain types of bacterial infections in the gastrointestinal tract. (8) (9)

Molybdenum is an essential trace mineral that also acts as a cofactor for enzymatic reactions and may help break down sulfites into sulfates. Many patients reported their brain fog disappearing. Dr. Greg Nigh recommends Mo-Zyme (from Biotics)—it is best to chew it.

Many people fear prebiotics in SIBO, but galacto-oligosaccharides (GOS) may benefit SIBO warriors by stimulating the growth of beneficial bacteria in the gut. Prebiotics like GOS support a healthy microbiome by providing food for probiotic bacteria, such as Bifidobacteria and Lactobacilli, which can enhance gut health and function. In the context of hydrogen sulfide SIBO, the potential effects of GOS could be beneficial; by promoting the growth of beneficial bacteria, GOS might help outcompete sulfur-producing bacteria, potentially reducing hydrogen sulfide production. It can also be a great addition if you are working on eliminating harmful bacteria with antibiotics or antimicrobials so you can help preserve the presence of beneficial gut flora.

If you are a tea drinker, I have good news! Research has shown green tea extract can help reduce levels of hydrogen sulfide because green tea polyphenolic antioxidants can oxidize hydrogen sulfide. (10) (11) Other polyphenols like resveratrol, quercetin, and curcumin may also help inhibit these bacteria.

As with all types of SIBO, it is crucial to support gut motility. Prokinetics are medications or supplements that can help stimulate the muscles of the gastrointestinal tract to move contents along more efficiently. (12) Natural prokinetics include ginger and artichoke, while prescription options might include low-dose naltrexone or prucalopride. (13) (14)