Vitamin A, E K: This bundle delivers Vitamin A for a youthful appearance and strong immunity, plus powerful antioxidant Vitamin E from South American annatto to protect against free radicals. Combined with 5,550 mcg of Vitamin K2 (K2-4 K2-7), these nutrients help keep calcium in your bones and out of your arteries. Vitamin D3: Unlike standard vitamin D supplements, D3 Complete harmonizes 1000 IUs of Vitamin D with its essential counterparts: Vitamins A, E, K. When taken together these 4 nutrients are greater than the sum of their parts. Multi-Nutrient Formula: AlgaeCal Plus provides 16 key nutrients for stronger bones. It includes 13 bone-building minerals, plus vitamin D3 for calcium absorption, K2-MK7 to direct calcium to bones, and vitamin C to combat the root cause of bone loss. Clinically supported to increase bone density, these nutrients are a new chapter in bone strength and health support for women. Increase Bone Density: The only calcium supplement clinically supported to increase bone density. Plant-based bone density supplement with 16 nutrients. Each serving provides calcium (720 mg) along with magnesium, potassium, boron, manganese, vanadium, phosphorus, copper, zinc, nickel, strontium, silicon, and selenium—plus vitamins D3, K2-MK7, and C. That's why AlgaeCal works! It's got the right amount of bone health vitamins minerals clinically studied to increase bone density. Clinically Supported: AlgaeCal Plus is supported by 20 years of research, including three published clinical trials. Our organic calcium supplement is the ONLY calcium supplement clinically supported to increase bone density. So if you want to improve your bone strength––AlgaeCal is the only clinically backed option.