@jasperina @ans For over 5 months I've been taking their Algae Cal Collagen which claims "4 Patented Collagen Powders Supported by 25 Clinical Studies", mostly because I haven't found anything that has similar documentation. I did get a dexa scan not long before I started this. I have also been on a general health journey, so I'm eating very clean (high protein and fiber, little in the way of processed food, include whole foods daily at every meal, and take a variety of other supplements (eg Vitamin D, K2, Magnesium (glycinate & threonate), a food based multivitamin...and others). I don't supplement with calcium but eat lots of foods that are naturally high in calcium: dark leafy greens, yogurt, kefir, etc. Do I know if it 'works'? Not yet. I will say that their scoop measures out more than one serving per the grams on the package, so unless you weigh each serving don't expect it to last 6 months (I'm a little over 5 months and almost out). It's expensive, even if you pre-order a so-called 6 month supply ($246 or $41/month(...their price for one month on their site is $62! I did try one jar of it from Amazon first so I guess I've taken it for over 6 months total now. Their current price for one jar is $55.80. I did look into their other products and did find the controversy over Strontium a bit off-putting. Currently trying to decide if I want to order another 6 month supply. I have an annual physical coming up in June and will probably get another dexascan. It will be interesting to see if there's any improvement in my osteopenia.