August marks the unofficial start of ragweed season. If you’re one of the 36 million Americans who suffer from this evil cousin of the sunflower, steer clear of bananas, cucumbers, melons, and zucchinis, says Clifford W. Bassett, MD, assistant clinical professor of medicine and otolaryngology at Long Island College Hospital in New York. “The protein in the skin of these foods actually causes your body to produce histamine—which is what makes you sneeze and itch,” says Basset. So eating these fruits and veggies during allergy season sets you up for a histamine-producing double-whammy, worsening your symptoms. To treat homeopathically, Dana Ullman, MPH, author of The Homeopathic Revolution (North Atlantic Books, 2007), recommends taking a pellet of 30C ambrosia (aka ragweed) every two hours during intense symptoms and every four hours for mild symptoms.