Within my first year of college (over 20 years ago), the same time I discovered I was lactose intolerant, I also developed allergies and asthma. I was now allergic to the cats I had grown up with and I was also now dealing with seasonal allergies. I was so congested that even after over a year of antibiotics, my sinuses were so clogged that my ENT recommended sinus surgery.
I was constantly catching colds, had a lingering cough from postnasal drip, and had to sleep with a cough drop in my mouth and a box of tissues and an inhaler next to my bed. I couldn't exercise intensely or I'd have a coughing attack. All it took was eliminating dairy, and within a week I could breathe easier. Four years later, I haven't needed allergy or asthma meds — it's amazing!
Image Source: POPSUGAR Photography / Sheila Gim