We need B vitamins for healthy nerves and brain cells, and feelings of anxiety may be rooted in a B vitamin deficiency. Avocados are rich in stress-relieving B vitamins. Bonus: They're also high in monounsaturated fat and potassium, which help lower blood pressure. Next time stress has you reaching for a pint of full-fat ice cream, opt for a non-dairy DIY version made with avocado blended with a ripe banana, vanilla extract, nut milk, and nonnutritive sweetener. Freeze, then chill-out.