Feeling more irritable or experiencing mental fog is commonly linked to stress, but it could also indicate low potassium levels. Potassium is crucial for optimal nerve function and cognitive clarity. Inadequate potassium intake can contribute to mental sluggishness and affect mood negatively. To combat these symptoms, incorporate more potassium-rich foods such as melons, leafy greens, and citrus fruits into your diet. This dietary adjustment may help clear mental fog, enhance cognitive function, and promote emotional stability.