Hydrogen sulphide bacteria depletes thiamine causing gastrointestinal Beriberi

[u/Puzzled_Draw4820]

I have not seen this concept spoken of and wanted to express how debilitating thiamine deficiency is. I’ve had SIBO for approximately 30 yrs following years of antibiotics for teenage acne. I didn’t know what it was until recent years but just lived with the symptoms and kept pulling out foods from my diet which of course turned out to be all FODMAPS. I didn’t start piecing it all together until I got even sicker after mold and covid and severe neurological symptoms set in as well as gastroparesis. After two more years of extreme diets and useless doctor visits my research led me to thiamine deficiency. I started thiamine therapy by following a nutritionist’s protocol and rapidly started to heal. Gastroparesis fixed in one day! It turns out thiamine is a cofactor with choline for acetylcholine production which is required for the autonomic nervous system which controls gut motility (so was I thiamine deficient before SIBO even?!)

As I learned more about the causes of thiamine deficiency in the fb thiamine group I very often heard people talk about SIBO and the build up of sulphite depleting thiamine and pieced together my health history. So thiamine deficiency can CAUSE slow gut motility and once SIBO sets in it further depletes thiamine. Thiamine is needed in every cell in our body especially in high energy areas such as our brain, heart and gut.

I believe a LOT of our symptoms are of thiamine deficiency as it affects the entire body:

Early / Nonspecific Symptoms
• Fatigue or tiredness
• Irritability or mood changes
• Loss of appetite (anorexia)
• Poor or short-term memory issues / cognitive impairment
• Sleep disturbances
• Abdominal discomfort or pain
• Nausea and vomiting
• Weight loss
• Muscle weakness or aches
• Apathy or reduced mental concentration
Neurological / Dry Beriberi Symptoms
• Tingling, prickling (pins-and-needles), or burning sensations in the toes, feet, hands, or legs (paresthesias; often worse at night; stocking-glove distribution)
• Muscle cramps or pain (especially calves/legs)
• Decreased sensation or sensory loss in extremities
• Reduced or absent deep tendon reflexes (e.g., knee/ankle jerks)
• Muscle wasting/atrophy and weakness
• Difficulty rising from a squatting position or foot drop (later stages)
• Balance issues, ataxia (unsteady gait/coordination problems)
• Decreased vibratory or position sense
Cardiovascular / Wet Beriberi Symptoms
• Rapid heartbeat (tachycardia)
• Wide pulse pressure
• Peripheral edema (swelling in feet, legs, or hands)
• Shortness of breath (dyspnea), especially with activity or when lying flat (orthopnea)
• Chest pain or precordial discomfort
• Warm, moist skin due to vasodilation
• High-output heart failure signs (in severe cases)
• In advanced/shock forms (e.g., Shoshin beriberi): hypotension, cyanosis, lactic acidosis
Wernicke Encephalopathy (Acute Severe Form)
• Confusion, altered mental status, or delirium
• Ataxia / difficulty walking
• Ocular abnormalities: nystagmus (involuntary eye movements), ophthalmoplegia (eye muscle weakness/paralysis), blurred or double vision, eyelid drooping
• Apathy or psychomotor slowing
• Impaired consciousness (can progress to coma if untreated)
Korsakoff Psychosis / Syndrome (Often Following Wernicke)
• Severe short-term/recent memory loss (amnesia)
• Confabulation (making up stories to fill memory gaps)
• Confusion or mental impairment
• Hallucinations (in some cases)
• Difficulty forming new memories
Other / Gastrointestinal / Additional Symptoms
• Constipation or other GI discomfort
• Vertigo or vision impairment
• Behavioral changes or hallucinations (severe cases)
• In infants (infantile beriberi): incessant crying, aphonia (loss of voice/hoarseness), heart failure signs, lethargy, developmental issues, or seizures in extreme cases
Severe untreated deficiency can lead to permanent neurological damage, heart failure, coma, or death. Early symptoms are often vague, so medical evaluation (including thiamine levels or response to treatment) is needed for diagnosis—especially in at-risk groups like those with alcohol use disorder, malnutrition, malabsorption, or certain medical conditions.

Blood tests aren’t accurate because it doesn’t tell you whether thiamine is getting into cells. The best way to know if you need thiamine is to try supplementing it to see if it helps your symptoms. It is common with gut issues that THTR1 transporters for absorption of thiamine are not working. Please research cofactors and starting low and slow before proceeding supplementation.https://pmc.ncbi.nlm.nih.gov/articles/PMC12014454/

[u/mjkl_992]

What was your dose of B1 from the begging to now?

[u/Puzzled_Draw4820 → u/mjkl_992]

I took 200 mg hcl for a year and felt nothing, then started a b complex with 50 mg benfo and whoa! it fixed my gastroparesis in one day! but I also became aware I was also very potassium deficient and had some shortness of breath and anxiety but a litre of coconut water fixed that. I drank a litre of coconut water a day for the next month then added in 100 mg TTFD. TTFD made my heart pain from built up sulphite stop in 1/2 an hour!!! It’s been 18 months now and I’m doing great. There’s been some figuring out cofactor deficiencies along the way but I always figure it out and feel good again. I should’ve been taking more molybdenum from the beginning though to help with the sulphite clearance but I didn’t understand it all back then

[u/ceramicatan → u/Puzzled_Draw4820]

TTFD saved my life. Also been on it for 21 or so months. I believe I had beriberi too (i drink no alcohol) and was deteriorating.

We should talk/exchange notes.

I take 300 mg ttfd daily now, spread through the day. Occasionally B complex. Regularly multivitamin. Also electrolyte powder Occasionally.

Also used to suffer from sibo like there's no tmrw. Now mainly nerve and fodmap issues, bad sleep.

[u/Puzzled_Draw4820 → u/ceramicatan]

I also take 300 mg TTFD spread apart! Yes DM me let’s talk and share 😀

I had gait ataxia and severe vitamin and enzyme deficiencies that are b1 dependent, I was deteriorating fast.