Should a woman in her late 20s who doesn't eat veggies and rarely eats any fruits take a multivitamin?

Yes. Hi Giselle, yes, you should take a good multivitamin. But better yet, consider improving your diet. Fruits and vegetables have a great variety of taste and texture, you're missing out when you don't eat them, not to mention they are good for you. Try stir fry veggies, as served by ethnic places, Thai, Chinese, Vietnamese. Ultimately follow this site: www.choosemyplate.gov.