How It Works: Vitamins D3 and K2 have been extensively studied regarding their roles in calcium metabolism.* Research indicates that a synergistic relationship exists between vitamin K2 and vitamin D3, especially in terms of bone strength and cardiovascular health.* While vitamin D3 is recognized for its role in calcium absorption and metabolism, it is vitamin K2 that directs calcium to bones rather than joint spaces and arteries.* This product is formulated with a clinically relevant dose of MK-7, a unique, soy-free form of vitamin K2 that has been shown to promote healthy vascular structures.* Protocol For Life Balance is an A-rated GMP manufacturer of premium dietary supplements created for healthcare practitioners. Our product line is comprised of effective, science-based formulations intended to address common nutrient deficiencies and support healthy physiological function. These formulations are based on the latest advances in nutritional science and incorporate trademarked ingredients of the highest quality. Our serving sizes are based on doses used in clinical trials and other published data, and the ingredients used in our products have been tested for efficacy in clinical trials and laboratory studies. At Protocol For Life Balance our mission is to provide high-quality, affordable solutions that empower people to lead healthy and happy lives. Our extensive line of premium health products use well researched ingredients that meet the highest quality standards. Every Protocol For Life Balance product must pass a rigorous internal review to ensure relevance, efficacy, and quality.