Jul 25, 2020 · Answer: Vitamin D3 (cholecalciferol) from either source is the same compound. As explained in the What It Is section of the Vitamin D Supplements Review, vitamin D3 in most …

Dec 1, 2025 · See our tests and comparisons of vitamin D supplements and find out which we consider the best to use -- including those with calcium. Also learn how to choose the right dose and form of …

Dec 8, 2025 · Find the best calcium supplements for bone health based on our tests and comparisons. See which products failed tests and which are our Top Picks based on quality, dosage, and cost. …

Oct 14, 2025 · Find out which 8 supplements may be needed by vegetarians or vegans to meet all their daily nutrient requirements and learn ways to find supplements that do not contain ingredients …

Sep 30, 2024 · Find out which vitamins & supplements may improve your balance to help reduce the risk of falling, including vitamin D and protein.

Dec 9, 2015 · Learn more about how to take vitamin D, the best form to take and the best time of time day to take vitamin D.

Aug 22, 2024 · Find out if supplements such as folate, vitamin B-12, niacin, thiamin, iron, vitamin D, and/or fiber are needed when following a gluten-free diet. Also learn how to find gluten-free …

Dec 8, 2025 · See which vitamin K supplements are ConsumerLab's Top Picks. Also learn what vitamin K does and does not do, the difference between vitamin K1 and the MK-4 and MK-7 forms of vitamin …

Nov 17, 2025 · Be careful with canned fish! Our tests showed which tuna, salmon, sardines, and mackerel are best or worst based on amounts of beneficial omega-3s (EPA and DHA) and …

Aug 2, 2020 · Find out amounts of omega-3s (DHA and EPA), protein, and vitamin D in sardines, as well as contaminants mercury and arsenic based on ConsumerLab's tests.