I'm smack in the ‘­sandwich generation,' where I drive school carpools, help with homework and search for Christmas gifts for my whole family, while also being a full-time caregiver to my mom.

Lynn’s mother, Edna, developed dementia in her 70s. An early clue was when Edna placed her electric rice cooker on the stovetop burner and turned the burner on high. The plastic in the rice ...