Why must vegetarians carefully plan their meals?

• A. Plant-based diets always provide all nutrients
• B. Supplements are illegal for vegetarians
• C. It can be difficult to get all essential vitamins and resources from plants alone
• D. Plants contain too much fat

Answer: (C)

Vegetarian meals require planning because some nutrients are harder to obtain from plants alone. Certain vitamins and minerals are less abundant or less easily absorbed in plant foods, so careful selection and sometimes fortified products or supplements help ensure all needs are met. For example, vitamin B12 isn’t reliably available in plant foods and is often consumed via fortified foods or supplements; iron from plants (non-heme iron) is less readily absorbed than iron from animal sources, so meals are planned to optimize absorption with vitamin C-rich foods and appropriate iron sources. Other nutrients to watch include calcium, iodine, zinc, and omega-3 fatty acids, along with overall protein and energy intake. Because of these gaps, vegetarians typically vary their foods and may use fortified products or supplements to cover any shortfalls.