Your symptoms of apathy, laziness, and disturbed sleep after consuming buttermilk could be due to: Temporary digestive system adjustment to probiotics Possible sensitivity to the lactic acid bacteria in buttermilk The body's reaction to biogenic amines in fermented dairy products Management Plan Stop the probiotic supplement temporarily Reduce buttermilk consumption Monitor your symptoms Dietary Modifications: Start with small amounts of buttermilk (100ml) and gradually increase if tolerated Consume buttermilk after meals rather than on an empty stomach Avoid nighttime consumption to prevent sleep disturbance If symptoms continue despite these modifications, please consult a gastroenterologist for a detailed evaluation to rule out underlying digestive issues or intolerances.