Mayonnaise is prepared using the process of emulsification, wherein it is made with egg yolk, oil, vinegar or lime juice. In some cases when the preparation and storage of mayonnaise is not done in the right way it leads way for bacteria to breed. What’s more, the presence of oil makes it more fattening. In fact, a spoonful of mayonnaise has around 94 calories, which can simply increase your calorie intake unknowingly.
It has been observed in a few studies that homemade mayonnaise turns out to be a breeding ground for bacteria, if it is not prepared and stored properly. As compared to the commercially prepared mayonnaise, which is prepared with additives and preservatives. However, in both the cases, mayonnaise is high on calories. Hence, it is always advised to keep a check on the quantity of mayonnaise consumed. Especially, if you trying to lose weight then mayonnaise based delicacies can ruin your efforts to lose weight.
Source: Thanks https://timesofindia.indiatimes.com/life-style/food-news/why-mayonnaise-is-among-the-unhealthiest-foods-you-must-be-having/photostory/73118804.cms