Syn-Flex For Pets Glucosamine ComplexSynflex For Pets is ideal for joint and cartilage protection and growth. Syn-Flex For Pets is veterinarian recommended.Ease articular joint pain Assist in rebuilding & rehabilitating damaged cartilage Reduce inflammationImprove mobility Liquid Glucosamine found in Synflex is one the most effective osteoarthritis formulas on the market today. Synflex is formulated with the highest quality Glucosamine and ten other synergistic arthritis fighting ingredients like chondroitin, boswellin, bromelain, yucca, omega 3 and omega 6 fatty acids to name a few. What is White Willow Bark?White Willow Bark contains an ingredient called Salicin. When introduced into your body, itbecomes salicylic acid. In an arthritis product, it provides one more anti-inflammatory to theformula. As well, it helps reduce prostaglandins which cause pain and inflammation. Althoughaspirin was originally derived from acetylsalicylic acid, White Willow Bark is different. It provides relief without the possible side effects of aspirin. As those who have used Syn-flex regular formula know, Synflex has powerful anti-inflammatories working for you. Syn-flex 1500 justadds this little "extra" power to the formula. Safe, highly effective and delicious! White willow bark is not aspirin. Nor, does it have the side effects which can be caused by aspirin.White Willow bark contains an ingredient called salicin. When introduced into your body it becomes salicylic acid. In an arthritis product, it assists in reducing inflammation. As well, it helps reduce prostaglandins which cause pain and inflammation. The first known aspirin was developed over 100 years ago and was derived from acetylsalicylic acid. However, that was derived form a different herb; namely, meadowsweet.