Meals and entertainment that are directly related to your business are deductible. Generally this would mean meeting with clients, or snacks that you provide for customers. (My auto dealership service waiting room is stocked with pop and granola bars, for example). There has to be a direct relationship between the expense and your business income or expectation of future income.
However, food you eat yourself I would interpret as personal expense that is not deductible unless you are traveling away from home on business.
See IRS publication 463. The distinction is between "meals" (food you consume yourself) and "entertainment" (which can include food you provide to customers, including when you share a meal as part of landing a client, but not including personal food.)
