Question

Dairy causes severe asthma.

Answer 1

This claim is false. Dairy does not cause severe asthma, but if you have a dairy allergy, it can trigger symptoms similar to asthma (Healthline). Healthline also says that both asthma and food allergies trigger the same reactions because "the immune system goes into overdrive because it mistakes a food or other allergen as an attacker." It releases chemicals to protect your body from substances like pollen or nuts, causing symptoms like wheezing, coughing, runny nose, and shortness of breath (WebMD). This is called allergic asthma, or allergy-induced asthma. 

Comments

This claim is false. Dairy does not cause severe asthma. Multiple sources claim that if you have severe allergies to dairy, then this may cause you to have asthma-like symptoms. But no credible medical professional, researcher, or doctor has ever claimed that consuming dairy can cause severe asthma. This video has no credibility what so ever with his information coming off of "Instagram and Facebook" according to the video.
https://www.webmd.com/asthma/asthma-and-dairy
https://www.healthline.com/health/allergies/dairy-and-asthma#:~:text=Drinking%20milk%20or%20eating%20dairy,dairy%20and%20other%20food%20allergies.

Answer 2

The claim that dairy causes severe asthma is false. According to National Library of Medicine, the idea that dairy causes asthma comes from food allergies that prolong the affects of asthma in young children. Dairy happens to be the most common food allergy in your children and the allergy is what causes "asthma" to seem so severe. By cutting out the allergy of many different foods not just dairy affects of asthma or the reaction that your body might have to different foods would calm down or be non existent. It really depends if the person is allergic to the dairy which would cause asthma to be worse. 

https://pmc.ncbi.nlm.nih.gov/articles/PMC8012302/