High blood pressure is a sign the body is under stress and adapting. Could be a hormonal issue, could be heavy metal poisoning, could be another toxin that has previously put a load on the body.

Does she have any metal fillings?

Does she have a healthy thyroid? Iodine can help with that regarding metabolism.

Does she take any medications?

Or she could simply have a sensitivity in the food you might not. I think dairy and the hormones in meat can have a harder impact on women than men.

Just food for thought. Be well.