People with severe food allergies have a new tool in their attempt to find menus that fit their diet: federal disabilities law. And that could leave schools, restaurants and anyplace else that serves food more vulnerable to legal challenges over food sensitivities.

A settlement stemming from a lack of gluten-free foods available to students at a Massachusetts university could serve as a precedent for people with other allergies or conditions, including peanut sensitivities or diabetes. Institutions and businesses subject to the Americans With Disabilities Act could be open to lawsuits if they fail to honor requests for accommodations by people with food allergies.