A 'cortisol cocktail' is a 2024 viral TikTok wellness drink — typically containing coconut water, orange juice, sea salt, magnesium and cream of tartar — claimed to lower the stress hormone cortisol. Medical experts note that ordinary hydration and salt intake will not meaningfully change cortisol levels in healthy people, but the drink is harmless to consume. If your teen makes one, they are following a wellness trend. No concerns about the drink itself; worth a gentle conversation about wellness marketing claims.