@glojo I have read about heavy metals in products, like cadmium. Cadmium is found in soil so it depends where the greens have been grown and what fertilizers have been used. I bought whey protein protein powder which is recommended. Greens with a deep root system have more cadmium, for example spinach.

@glojo The reason your parents lived a long life is because of the quality of food they ate. Corporations, on the quest for greater profits, grow and process animal and produce in infant states, steers at 18 to 24 months, produce is picked green and then exposed to ethaline or xyline gas to turn it the appropriate color. The fruit remains firm. Less is lost in shipping. This creates a mineral and protein deficiency. All the collagen on the market is still processed from the same animals except one and it won't be on the market for another month: Rejuvenation Guaranteed. Com. The sourced animals are older, free range, wild caught, organic. Their protein is hydrolyzed for bioavalability and mixed at concentrations that corporations won't touch because that have boards to answer to. For instance collagen 10 is expensive so most collagen companies use no more than 1 to 3 percent. RG also adds a true bioflavinoide not an ascorbic acid which is a synthesised vitamin C. Your body knows the difference. This product guarantees results in 90 days or your money back. How do I know about this? I was in the clinical study. I feel better now than when I was in my late thirties. I workout and I have the body and skin of a much younger man. Their website will be up in a week or so. This is the future of medicine. Give your body "Nutritional restoration" and the body will do what it evolved doing, heal itself.