Yes, alcohol can cause brain fog. Alcohol changes our brain’s circuitry, which impacts our brain’s ability to communicate with the rest of the body and perform basic cognitive functions. It shrinks the areas of the brain responsible for decision-making, inhibition, judgment, and problem-solving. Brain fog is not a scientific term and can manifest in different ways. Usually, when we talk about brain fog, we’re referring to memory loss, forgetting common names and places, feeling slow, less sharp, or fatigued.  Consuming moderate to high amounts of alcohol can cause long-term damage, leading to all these symptoms.  It takes moderate drinkers between 2-6 months of abstinence from alcohol to return their neural circuitry to normal. For heavier drinkers, the recovery time can be even longer.