Here is a summary of the text in a concise format: High blood pressure patients should avoid the following foods: * Processed snacks like crackers, chips, and cookies * Fried foods and other foods using vegetable shortenings and margarine * Processed meats like bacon and hot dogs * Canned foods with preservatives * High-sodium foods like pickles and potato chips * Fatty meats * Vegetable oil and margarine (high in trans fat) * Table salt It's also recommended to limit or avoid grapefruit. These foods can exacerbate high blood pressure, so it's essential for patients to be mindful of their diet and make healthier choices.