Chapter One Vitamin C acts as an antihistamine and supports a healthy immune system. Vitamin C also has an integral role int the synthesis of collagen, the "glue" that strengthens the muscles and blood vessels. Kosher certified under the strict supervision of Rabbi Sh. Stern and the Orthodox Union. Vitamin C promotes a healthy immune system and supports a healthy supply of collagen, which forms connective tissue like skin and cartilage. Recommended Use: Take 1 gummy daily, or as directed by a healthcare professional.