World's Strangest Hangover Cures

Oxygen Bar

What It Is: Scuba divers have been known to take a few onshore hits from their regulators to clear their heads. A similar breathing remedy is used around the world at walk-in oxygen bars, where the air is enriched with 95 percent oxygen (as opposed to the ordinary 21 percent).

Why It (Supposedly) Works: Proponents claim that extra oxygen improves the body’s overall metabolism, thus hastening the breakdown of alcohol-related toxins. Oxygen-enhanced air can also be infused with aromatherapeutic scents, like calming lavender or energizing mint (although adding these decreases the level of 0²).

Where to Experience It: Paris’s Bleu Comme Bleu spa streams scented, oxygen-enhanced air at its “oxybar,” a small window-front counter in the sleek salon. Air tubes snake past beakers of pastel-tinted essential oils; choose the “retour de fêtes” scent for a headache-easing blast of ginger and citrus.