It's always good to take precautions, but according to a WebMD article, research conducted by Jennifer M. Maloney, MD, a pediatric allergist at the Jaffe Food Allergy Institute of Mount Sinai Hospital, it's been proven that allergens can remain in saliva for up to 4.5 hours. Even if it has been that much time, it's better to be safe than sorry. Brush your teeth or skip nuts for the day altogether. But make sure you wait a few hours.
It's not very romantic to give your parter an allergic reaction on a date.
Even if you're a parent and you think you've spared your child from eating your pistachio ice cream, if you kiss your little one on the forehead right after, he or she could actually have a reaction.
So BE CAREFUL! And happy kissing!
