Packaged and processed foods, such as cakes, cookies, candies, chocolate, yogurt, and marshmallows, often contain unfamiliar animal ingredients, so may be a special concern for vegetarians due to the likelihood of such additions.
Vegetarians' feelings vary with regard to these ingredients.
For example, while some vegetarians may be unaware of animal-derived rennet's role in the production of cheese, and may therefore unknowingly consume the product, Semi-vegetarian diets consist largely of vegetarian foods but may include fish or poultry, or sometimes other meats, on an infrequent basis.
Those with diets containing fish or poultry may define meat only as mammalian flesh and may identify with vegetarianism.
We've divided diet plans into two categories: do-it-yourself (DIY) plans, which give you all the information you need to buy and cook your own food, and meal delivery plans, in which all or most of your food is prepackaged and shipped to your door.
Do-it-yourself (DIY) diet plans are cheaper and more flexible, suggesting menus and shopping lists to help you plan healthy meals yourself.
Both types of diet plans offer tools to help you track your progress and all the guidance you need for a successful diet.
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Next researched hundreds of online diet programs and has reviewed and compared the top programs.
Check out the chart below to compare different programs at a glance, or read our detailed individual reviews.