Final answer:
Collard greens are the best nondairy source of calcium for individuals with lactose intolerance, offering an alternative to dairy while still fulfilling the body's calcium needs for bone and cellular health.
Step-by-step explanation:
A nurse providing teaching to a client with lactose intolerance should recommend collard greens as the best nondairy source of calcium.
Collard greens, as well as other green leafy vegetables, are rich in calcium and do not contain lactose, making them a suitable alternative for those with lactose intolerance. It's important for the client to find lactose-free sources of calcium since it is an essential nutrient for bone strength, and nerve and cell membrane functions.
Additional nondairy sources of calcium include broccoli, nuts, beans, seeds, and certain types of fish like canned sardines with bones. While ground beef, cauliflower, and walnuts provide various nutrients, they do not offer as much calcium as collard greens. Including these calcium-rich foods in the diet can help maintain healthy bones and prevent the complications associated with lactose intolerance.