Brain FogChronic FatigueGastritisIntrinsic FactorLow Stomach AcidNerve HealthPernicious AnemiaStomach HealthSublingual B12Vitamin B12 Deficiency 8 Feb 2026 Exhausted Despite Sleeping? Your Stomach Might Be Starving Your Brain of B12 You sleep 8 hours, drink your coffee, and try to push through, but the "brain fog" and …