My friend have a stomach ulcer i want to help her. what foods should not be cooked? no vinegar, right?

Ulcers: Generally acidic foods like vinegar, wine, oj, lemon juice, lime juice, tomatoes as well as spicy foods, fried/fatty foods, caffeine/coffee & soda pop exacerbate ulcers. Even milk should have as low fat content as person can tolerate. Hopefully she is taking medication to help heal the ulcer; then she will gradually be able to eat the foods she enjoys again.