I purchased some nitric oxide test strips from a source online and on two occassions my levels came back looking really low. This has me really confused seeing as Im young, I eat pretty healthy, exercise frequently, dont smoke, rarely drink, not on any meds etc. TRT has definately improved my libido and quality of my erections the two months Ive been on it and I know two months isn't a lot but I wonder if increasing my nitric oxide would help even further? Do any of you have experience with this, and or know any proven effective methods besides "exercise and take arginine" to improve nitric oxide levels?