Americans don't have the best eating habits. 

Only 18 percent of the respondents in a new Vitamin Shoppe survey say they have three balanced meals every day, while most people only average three square meals a day four days a week. Fifteen percent say they never eat three nutritious meals in a day.

Time issues seem to pose the biggest obstacles to healthful eating. Just less than 40 percent say it takes too long to prepare healthful, nutritious meals. Nearly 30 percent blame their jobs for keeping them out of the kitchen, while 18 percent say "family obligations" make it difficult for them to follow a healthful diet. 

Ten percent admit they "don't know how to eat healthy."  More one-third admit they've gone at least a week without eating a single fresh vegetable, and 3 percent confess they "cannot remember" the last time they had a fresh vegetable. However, 90 percent believe they usually get all the nutrients they need from the foods they eat. In addition, 64 percent take vitamins at least once a week.