my mother has low renin level .1 and low aldosterone 8.1 she has had varied bp over the course of months (extreme highs and lows). for a woman with thyroid issues once being told it didn t work she has lost a great deal of weight over the last few years. She has sweat attacks even in the winter. her co2 level in her blood is elevated, 31 (standard score of 22-28). Any ideas on what this could be caused by? She has seen a neurologist for seizures in the last 5 years, a heart doctor who tried to control her bp and is currently seeing an endocronologist who apparently does not see anything wrong with the numbers produced in her blood tests. I could really use help in knowing what to focus on in a next step as I am very concerned for my mother s health.