HIGH POTENCY - Country Life's Vitamin D3 5000 IU supplements are high potency, providing a substantial dose of this essential vitamin. Ideal for those who lack sufficient sun exposure or have higher vitamin D needs. BONE AND TEETH HEALTH - Vitamin D aids in the absorption of calcium, helping to form and maintain healthy bones and teeth. This makes it an essential supplement for overall skeletal health. SUPPORTS IMMUNE AND COLON HEALTH - In addition to its benefits for bones and teeth, Vitamin D also supports colon and immune health, making it a versatile supplement for overall wellbeing. SUSTAINABLE AND SAFE SOURCE - The Vitamin D3 found in this formula comes from lanolin, a sustainable and safe source. It is also in a base of medium chain triglycerides (MCTs) VARIETY OF POTENCIES - Country Life offers Vitamin D3 supplements in a variety of potencies, including 1000 I.U., 2500 I.U., and 10,000 I.U., to cater to individual nutritional needs. New 100% PET Bottles – Same Trusted Formula - New Lighter Durable Bottles. We’re transitioning from glass to 100% post-consumer recycled PET plastic bottles for our Amazon customers. A change that helps us reduce waste and support a greener planet—while continuing to preserve the same high-quality ingredients and effectiveness you count on from Country Life Vitamins.