I changed from 18 mths taking Revive active to Sisterley 5 mths ago. I am 62 with an auto.immune condition so was not sure if I would feel the difference but I am very pleased with the changes - my hair is stronger, my nails are so strong and no more ridges and my energy has increased. I can see the impacts also in my bloods. So very happy and i make sure i never miss a day !