Case report A 36-year-old woman had been desensitized to mug- wort pollen 1 year previously for treatment of sea- sonal rhinitis. Symptoms of sunflower seed allergy. Sunflower is likely the most second most common seed allergy in the U.S. Not much is known about sunflower allergy. We wish to draw attention to cross-reactivity between this pollen and proteins in sunflower seeds as well as possible food allergy to traces of these proteins found in sunflower oil and margarine. Authors A B Halsey, M E Martin, M E Ruff, F O Jacobs, R L Jacobs. Vegetable Oil-usually reduces the bad cholesterol-has vitamins and is easy to digest (assimilate vitamins) with vegetables-makes the live produce bile (which improves digestion and stool evacuation) From my experience and research, I don’t think vegetable oil (besides having a specific allergy) can cause IBS, Constipation or other symptoms. Sunflower oil is not allergenic to sunflower seed-sensitive patients J Allergy Clin Immunol. Symptoms of an allergic reaction to sunflower include oral allergy syndrome, bronchial asthma, allergic rhinitis, conjunctivitis, angioedema, contact dermatitis, and skin lesions of an acute urticaria.12 The first case of sunflower seed allergy was described in 1979. It might actually be an allergy to sunflower seed. There are allergy tests available to diagnose and confirm an allergy to safflower. Just because you don't have an anaphylatic reaction doesn't mean you aren't allergic. I am allergic to it (along with a ton of other things) and my main symptoms are gastrointestinal. And all of a sudden, it seems alot of food companies are suddenly putting it into the food. I've had a sunflower seed intolerance for years with horrible stomach problems if I ever dare to eat them. But less refined or unrefined oils that contain the sunflower protein could possibly cause allergic reactions. My lips are red and swollen after eating some non-dairy ice cream that contains sunflower oil. The symptoms associated with sunflower seed allergy are almost similar to other allergies. During the skin tests several drops of safflower oil are placed on the skin scratches to see if the oil induces an adverse reaction. Highly refined sunflower oil would not likely cause an adverse reaction in those with a sunflower allergy. And now I'm finding I have it to anything with sunflower oil in it. Allergy to Sunflower oil? Read also about sunflower oil allergy symptoms. You may undergo skin or blood testing to diagnose this allergy. Therefore before buying the cooking oil you must check the level. 1986 Sep;78(3 Pt 1):408-10. doi: 10.1016/0091-6749(86)90025-4. Question. Tests. Sometimes sunflower oil is safe for an allergic person if it is highly processed. Symptoms of oral allergy syndrome include itchy mouth, scratchy throat, or swelling of the lips, mouth, tongue, and throat.