NesProteins Grass Fed Collagen Hydrolysate is free of harmful chemicals such as pesticides and herbicide because it contains no grain fed material. NesProteins is made from 100% Grass Fed animals. Clinical studies show that Grass Fed Collagen Hydrolysate improves gut health, general health & wellbeing to fix joints and muscles and has terrific antiaging properties. References 1. Kantor, I et al. 2002. Results of a Study Evaluating the Use of a Dietary Supplement Formula in the Management of Age-Related Skin Changes in Women with Moderate to Severe Wrinkling of the Periorbital Area. Journal of the American Nutraceutical Asscociation. Vol 5, No.2. 2. SOUKEN study 2008, Tokyo Japan: two month study hydrolyzed collagen. 3. DERMSCAN study, 2008, Lyon France. Cutaneous properties of hydrolyzed collagen. 4. Tanaka et al. Effects of collagen peptide ingestion on UV-B-induced skin damage. Biosci Biotechnol Biochem 73:930-932 (2009). 5. Matsuda, N.; Koyama, Y., Hosaka, Y., Ueda, H., Watanabe, T., Araya, T., Irie, S. and Takehana K. (2006). “Effects of ingestion of collagen peptide on collagen fibrils and glycosaminoglycans in the dermis”. Journal of nutrition vitaminology 52: 211-215. 6. Sumada E, Hirota A et al.: The effect of oral ingest of collagen peptide on skin hydration and biochemical data on blood. J. Nutri Food 7, (2004) 1-8 7. Morganti P, Randazzo S, Bruno C: Oral treatment of skin dryness. Cosmet Toilet. 103 (1988) 77-80 8. Koyama. Effects of collagen peptide ingestion on the skin. Shokuhin-To-Kaihatsu 44:10-12 (2009) (in Japanese). 9. Rousselot Publication, 2009. Hydrolyzed Collagen and Skin Health 2009 clinical studies results. 10. Eskelinin, A. and Santalahti, J. (1992) Special Natural cartilage polysaccharides for the treatment of sun-damaged skin in females. J Int Med Res; 20(2): 99 – 105 11. Proksch et al. (2014) Oral Supplementation of Specific Collagen Peptides Has beneficial Effects on Human Skin Physiology: A Double Blind, Placebo-Controlled Study. Skin Pharmacol Physiol 2014; 27:47:47 – 55 12. Zague et al. (2011) Collagen hydrolysate intake increases skin collagen expression and suppresses matrix metalloproteinase 2 activity. Journal of Medicinal Food 14 (6) 2011, 618–624 13. Matsumoto, H. et al. (2006) Clinical effect of fish type I collagen hydrolysate on skin properties. ITE Lett. 7. 386 – 390 14. Ohara H et al. (2010) Collagen-derived dipeptide, proline-hydroxyproline, stimulates cell proliferation and hyaluronic acid synthesis in cultured human dermal fibroblasts. The Journal of Dermatology Volume 37, Issue 4, pages 330–338.