Best Naturals Proline Supplement Supports Healthy Joint Function Important For Collagen Production Provides Structural Support, Supports Musculoskeletal Health No Articial Color, Flavor Or Sweetener, No Preservatives, No Sugar, No Starch, No Corn, No Soy, No Egg, No Lactose, No Gluten, No Wheat, No Yeast, No Fish, No Sodium During The Summer Months Products May Arrive Warm But Amazon Stores And Ships Products In Accordance With Manufacturers' Recommendations, When Provided L-Proline Is An Amino Acid Involved In The Production Of Collagen And Cartilage And May Help Support Healthy Joints And A Healthy Musculoskeletal System. L-Proline Can Be Made In The Body, But Low Protein/Vegetarian Diets May Not Always Promote Optimal Production