I believe that people with down syndrome are more likely than the general population to develop Alzheimer's disease in late life.
Make a weekly shopping list. Buy lots of healthy fruits and veggies. Buy pre-cooked meats like grilled chicken or steak fajita strips. Once home, wash and chop all veggies. These can be combined in minutes into healthy salad or stir-fried for a quick meal.
Chlamydia, The last option
Hope this helps!