Yes, taking too many probiotics can worsen acid reflux in some people, mainly through temporary gas buildup or histamine effects that increase stomach pressure.
Why Excess Can Aggravate GERD
High doses (e.g., 50+ billion CFU) overwhelm the gut, causing fermentation that produces gas and bloating, which relaxes the lower esophageal sphincter (LES) and pushes acid upward—especially relevant given your history of post-thali bloating and nighttime reflux.
Certain strains (L. acidophilus) may boost histamine, spiking acid production short-term, mimicking or intensifying heartburn; this aligns with your past probiotic trials causing gas.
Evidence and Balance
Reviews show probiotics often improve GERD long-term (reduced regurgitation in 79% of studies), but 20-30% report initial flares from overgrowth or SIBO exacerbation.
Stick to 5-20 billion CFU of low-histamine strains like L. reuteri or B. infantis, taken with meals; excess risks outweigh benefits without tolerance-building.
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