If you're not drinking kefir by now, you really should be. The miracle milk like this one from Fresh Bio-Tiful (£3) boasts a range of health properties you can benefit from daily. The probiotic is naturally high in protein and calcium and is packed with vitamins B12 and B2. With billions of gut-friendly bacteria, kefir supports your immune system and helps your digestion, aiding you in fighting off your hangover damage. If you feel like giving kefir a go, try a 21-day course with Chuckling Goat (£40).