I have purchased this product numerous times from Amazon. I know for a fact that Bulletproof is having issue with their Collagelatin. The formula has been changed OR it is extremely inconsistent and you never know if you're going to get a good batch or bad one. When I first started ordering this product it dissolved easily and was a fine white powder. My recent order has a yellow hue and different texture. It doesn't dissolve unless put into a blender and then it leaves a residue on the side of the blender. I called bulletproof and their standard answer is we haven't changed anything and if you bought the product from Amazon we can't guarantee anything!!!!! So buyer beware, bulletproof doesn't stand behind their product if you buy it from Amazon!!!!!!!

Started adding this to my bulletproof coffee a few months ago and haven't looked back. It's virtually tasteless but adds a nice subtle creaminess to the texture which is awesome. Most of all though, I dig the results I'm noticing. My ankle and knee joints feel smoother and more fluid, my muscle soreness after mt biking and snowboarding has subsided considerably and I seem to recover quicker, my skin is more supple and smoother (an added bonus for this 44 year old!), and my morning energy level stays stable. If you're a bulletproof coffee fan and haven't tried this blended into your bulletproof coffee yet, you are doing yourself a disservice.

Everything bulletproof is high quality. Put in my morning coffee as a part of morning ritual. Skin and nails look healthy, heal quickly from bruising, acts as weight management component.

Collagen helps my wintertime dry skin, and helps me keep my blood sugar balanced. Love this stuff!

Expensive but the best collagen on the market. Sourced from grass fed and finished cows.

My hair is growing again. A friend told me she took the bulletproof collagelatin as part of her food plan for mind clarity (to reverse dementia). While talking to her about that, she mentioned that a nice side effect was her hair thickened up. I'd been shedding hair for months while happily losing weight so I decided to try it. This friend has tried other brands of similar products (for her brain clarity) and she said she gets the best results from the bulletproof brand. And she uses their collagelatin so I decided to use this, too.<br /><br />Within three weeks my hair shedding was back to normal (zero to four hairs in the sink now, compared to dozens of hairs previously). And my hair is starting to fill in. There's still a lot of scalp showing but nothing like it was before. I've been using this for two full months. I'm now buying it through a subscription on the Bulletproof website.