I read this about beets also. But my grey hair never changes.
A note on my progress. Yes, my test was almost white on the test strip and now it is now very pink. As per the Berkely chart it is just at the threshold level. But this morning the test strip was white again. I had my Lakewood Juice before going to bed. Yes, I did finally buy the brand Lakewood from Amazon.
I am also taking Dr. Ignarro suggested supplements twice a day. I also take Ashwagandha, Sea Kelp and Brown Seaweed pills. So far very little improvement in my labido and ercetions. I guess it takes time.