I have used this GL Collagen Hydrolysate supplement for a couple of years. I stopped briefly but went back to it. At first I had a marked increase in hair growth including my eyelashes. My skin which was suffering from too rapid weight loss and tanning (and a lack of good sense there) greatly improved as well. I stopped the supplement for several months and then decided to go back to it when perimenopause came outta nowhere and attacked. But this time I didn't get the same boost in hair re-growth. Possibly because now I'm fighting the hormonal issues as well. I do however find that it still makes a very good and lovely difference in my skin's texture. My skin just feels and looks softer and more hydrated when taking this supplement. I also notice a plumping of my wrinkled areas on my face so that's absolutely awesome. I'm 50 and told I look 40. Imagine I could look 30 but for the aforementioned lapse in good judgment with the crazy weight loss and tanning. ...Even so, this is a supplement that I want to continue on with but with the caveat that I find if I don't take a day or two break from this every week or two and let too much build up in my system.. every now and then I will break out in Hives...not a major case.. but still enough to be annoying and who wants to sit around rubbing and scratching the irritated areas. I never take more than 2 Tbsp ONCE a day ..never the 2 Tbsp TWICE a day reccomended dosage.. I'd be afraid to try that much.. though it may be the jumpstart my hair re-growth needs. I just started a regimen of Hair Anew by Naturenetics with this collagen.. so hoping for good things there. One final note on the GL Collagen Hydrolysate container. Seriously. This is the best y'all could do for a canister? :| I almost have no words there as it's amazing such a good product could be purposely put into such a bad container. The pour spout is such a poor spout. It simply is aggravating at best. My tablespoons won't fit into the small weird shaped opening. And even if they would my tablespoons do not have 10 inch handles so I would never be able to reach the bottom of the container once the product got low enough. Plus we like to SEE how much product we have left for such purposes as reordering. And when the product does get low enough you are forced to pour from that spout but then product gets all hung up in the part of the top that you can't get to so you just have to shake the can and try to get it all out without spilling it everywhere. So here's my tip and workaround which works wonderfully.. I use my can opener to open my canister just like any other can of food. Once the offending spout lid is removed from my GL canister, I have this wide open mouth can that is so easy to deal with and I simply use an OATMEAL CONTAINER lid to secure the GL canister. The large oatmeal containers do not work..too big. But the mid-size oatmeal lids are simply perfect. They are even clear lids which looks really nice without having to have another product's logo on my collagen container. It's a perfect workaround to a small issue with the GL product. I do love this supplement. Quality product. ....The people in the lid department notwithstanding