Long COVID
Mild → no benefitIll for 5 years
Long COVID with brain fog, neuropathy and insomnia; thiamine and diet brought no benefit
- Condition
- Long COVID
- At worst
- Mild (working or studying, with limits)
- Ill for
- 5 years
- Last post
- Jul 2026
In their words
- Condition: Long COVID
But it’s still pretty possible that it all started after the covid. I didn’t have those b1 deficiency symptoms before.
In context ↗ - At worst: Mild
Yesterday I was at the gym running at 15 km/h and this drowsiness continued.
In context ↗ - Now: No benefit
now i still have this brain fog with all this supplementation
In context ↗ - Began after: COVID
it’s still pretty possible that it all started after the covid.
- Says they never had: Post-exertional malaise
sports do not change nothing
Read from 11 of their posts and comments; links to the 10 this page draws on
Summary
A 19-year-old man in Brazil had at least five years of gut dysbiosis linked to thiamine deficiency, brain fog, neuropathy and later histamine-related insomnia. High-dose thiamine, benfotiamine, sulbutiamine and cofactors gave limited help; benfotiamine seemed to correct neuropathy and sweating but not brain fog. A low-histamine diet slightly helped sleep. He thought he was beating it in June 2026, but by July sulbutiamine was still doing nothing.
Ask Miruvor AI
What they tried
Also tried
benfotiamine, thiamine HCl, sulbutiamine· Helpedlow histamine diet· Helpedgym, basketball, workouts· No changecopper bisglycinate· No changeiron infusion· No changeCyproheptadine· No changezinc· Worsecurcumin· Worsevitamin D3+K2 and sunlight· Not saidmagnesium (bisglycinate, threonate) and low-dose potassium chloride· Not saidmagnesium (bisglycinate, threonate) and low-dose potassium chloride· Not saidvitamin C· Not saidvitamin K· Not saidmethyl B12· Not saidB complex (B2 riboflavin, B3 niacinamide, folate)· Not saidglycine· Not saidCoQ10· Not saidfish oil· Not saidketo diet· Not saidvitamin A retinol· Not said
Their words about each treatment
- gym, basketball, workouts · No change
i do gym 3x week and basketball 3x week, sports do not change nothing
In context ↗ - vitamin D3+K2 and sunlight · Not said
vit D 50k ui weekly
In context ↗ - zinc · Worse
i notice i developt this HI-related insomnia after supplementing zinc and curcumin for something like 6 months
In context ↗ - copper bisglycinate · No change
i started using 6mg of copper bysglicinate everyday, stopped the zinc and curcumin
In context ↗ - magnesium (bisglycinate, threonate) and low-dose potassium chloride · Not said
1- mag bisglycinate 300mg
In context ↗ - vitamin C · Not said
1g of acid ascorbic vit C synthetic
In context ↗ - benfotiamine, thiamine HCl, sulbutiamine · Helped
i still assume all those improvements only happened due benfotiamine
In context ↗ - methyl B12 · Not said
methyl B12 1000mcg
In context ↗ - B complex (B2 riboflavin, B3 niacinamide, folate) · Not said
2- regular riboflavin B2 500mg (2x 250mg at different intakes), 3- regular B complex
In context ↗ - glycine · Not said
i take glycine to sleep better
In context ↗ - fish oil · Not said
regular fish oils
In context ↗ - iron infusion · No change
i also did iron infusions 3 months ago to see if something would be better. Nope.
In context ↗ - keto diet · Not said
almost keto diet
In context ↗ - low histamine diet · Helped
if i do a low histamine diet for one day im allowed to sleep PERFECTLY good
In context ↗ - Cyproheptadine · No change
even with Cyproheptadine (an H1) regular dose. i’ve been awake for 30 hours
In context ↗ - vitamin A retinol · Not said
every other day i take 8000ui/2,4mcg of retinol vit A
In context ↗
Their path
How ill they were on the ME/CFS severity scale, estimated from what they describe at each point, with time counted from when the illness began. Hover or tap a point. The chart starts 4.6 years after onset: the story doesn’t say how ill they were before that. 1 step says too little to place on the scale and is only in the table. Dates are when they posted. What the levels mean.
Show as a table
| When | What happened | Where they were | After |
|---|---|---|---|
| 2021 | gut dysbiosis beganhave gut dysbiosis for at least 5 yearsIn context ↗ | Not stated | |
| September 2025 | extreme sleepiness, brain fog and suicidal distressI'm at a suicidal level from so much mental exhaustion ... Yesterday I was at the gym running at 15 km/hIn context ↗ | Mild | |
| November 2025 | benfotiamine corrected neuropathy, sweating and anxiety but not brain fogonly improvements/correction of neuropathy, hands sweaty and shaking, cold feet, anxiety+derealizationIn context ↗ | Mild | Thiamine / benfotiamine |
| February 2026 | developed histamine-related insomnia after zinc and curcumin10 months ago i developed insomnia related histamine problemsIn context ↗ | Mild | |
| June 2026 | thought he was beating gut dysbiosis and thiamine deficiencyi think i’m beating thisIn context ↗ | Mild | Thiamine / benfotiamine |
| July 2026 | sulbutiamine still gave nothingi use it everyday. nothing.In context ↗ | Mild |
Adverse events
- Zinc, Copper“i notice i developt this HI-related insomnia after supplementing zinc and curcumin for something like 6 months (end of 2024-start of 2025). my thoughts is probably it tanker my copper levels” In context ↗ Insomnia from treatment
Symptoms mentioned
Anxiety & low moodBrain fogGut problemsHeadaches & migraineLight & noise sensitivityMast cell (MCAS) & allergiesNeuropathy & tinglingPOTS & dysautonomiaSleep problemsVision problems
Their words about their symptoms
- Brain fog
extreme difficulty concentrating
In context ↗ - POTS & dysautonomia
balance issues, vertigo
In context ↗ - Mast cell (MCAS) & allergies
insomnia related histamine problems
In context ↗ - Sleep problems
Everyday I feel extremely sleepy between 9/10 a.m. and 2/3 p.m
In context ↗ - Headaches & migraine
exploding with migraine
In context ↗ - Gut problems
severe gut dysbiosis
In context ↗ - Light & noise sensitivity
sensitivity to light
In context ↗ - Neuropathy & tingling
neuropathy, hands sweaty and shaking, cold feet
In context ↗ - Anxiety & low mood
anxiety+derealization
In context ↗ - Vision problems
eye floaters/white spots on my eyes
In context ↗