Every household has a list. Most have never written it down.
The constraint nobody mentioned
One person cannot eat dairy. Another will not eat seafood. A child has a tree-nut allergy diagnosed last year. Someone is managing their blood sugar. A religious practice shapes what appears at the table certain days of the week. These constraints are rarely written in one place, and they are almost never discussed together before the meal plan is made. Instead, they surface one at a time, usually at the table, when the dish is already served.
The result is a meal plan that works for most of the household most of the time and quietly fails the person whose constraint was forgotten. Over months, that person learns to solve the problem privately, eating around the edges of meals or supplementing on their own, which means the household plan is not actually feeding everyone it is supposed to feed.
Preferences and medical needs are different
A preference is a choice: vegetarian eating, cultural food traditions, a dislike of certain textures. A medical need is a constraint that carries consequences if ignored: a diagnosed food allergy, celiac disease, a medically prescribed diet for kidney disease or diabetes. The meal plan can accommodate both, but it needs to know which is which, because the substitution rules are different.
Replacing chicken with beans for a vegetarian is a preference adaptation. It needs to be nutritionally thoughtful, but the stakes are flexibility and satisfaction. Replacing wheat flour for someone with celiac disease is a medical adaptation. The stakes include the possibility of making someone sick. And for a diagnosed food allergy, even trace contact with the allergen can matter, which goes beyond what a simple ingredient swap can address.
A meal nobody can eat is not a meal plan. It is a menu that ignores the people sitting at the table.
Write the list once and plan from it
The action step asks you to name every dietary constraint in your household, all in one place. Allergies, medical diets, preferences, religious practices. For each one, note how it changes what you plan and whether it needs guidance from a health professional rather than a general planning course. This is the list that the rest of the course uses. It does not need to be a medical document. It needs to be honest and complete enough that no one's needs get quietly dropped from the plan.
The reading for this module
This is the core reading for the module. Take it with your earlier work beside you.
Name every constraint at the table.
Name every dietary constraint in your household: allergies, medical diets, preferences, religious practices. For each one, note how it changes the meal plan and whether it needs professional guidance rather than general planning.