I've had employers who see some dietary requirements as a good thing- can be a perception that someone who is seen as a healthy eater will take care of themselves in general and miss less work or require less accommodation in the workplace because of preventable illness or conditions. This is especially common with women- at a business lunch, you lose 'points' if you go with the fettucine alfredo instead of a salad-hold the cheese, dressing on the side.