 Douglas Laboratories has grown into a globally recognized leader in the development and manufacture of innovative science-based nutritional supplements. As a pioneer of healthy aging support, Douglas Laboratories manufactures nutritional supplements for the maintenance of long-term health and a healthier, active lifestyle. Designed for health-conscious consumers, their safe and effective products are the result of dedicated commitment to understanding the keys to unlock the potential of living healthier and longer lives. Here is a sampling of products from Douglas Laboratories. Vitamin D5000, this product supplies natural vitamin D3 in support of calcium absorption, bone metabolism, cell growth, and immune and neuromuscular function. Preventive X, this product is formulated to provide adequate intake of essential nutrients in support of energy production, hormonal balance, immune response, nervous system support, health maintenance, and overall optimal function. Multi-probiotic 4000, this formula provides prebiotics and a blend of beneficial probiotic strains in support of a healthy intestinal tract. A healthy immune response and a healthy balance of intestinal microflora. If you have any questions about Douglas Laboratories, please call, visit, or email professional Supplement Center.