Placenta formulas

Hello.. I was wondering what everyone's opinion is of the placenta formulas they have out on the market. I know they have been around for ages because I used them all the time as a teen. (that's been ages!) My stepmom used to buy the glass tubes for me in packages in the 70's. My hair was thigh length then and it worked wonderfully. They recently came out with it in a spray bottle and I bought some right before I started using the Aveda products and haven't used it since. I want to finish up the bottle since it's not cheap.. does anyone else use the stuff? have a great day.. Cher