Shipping & Handling Included* The estimated delivery time will be approximately 3 - 5 business days from the time of order. Add to Wish List We are committed to offering the best value to our members, with a risk-free 100% satisfaction guarantee on both your membership and merchandise. If you have questions about your membership or products you've purchased at Costco, please visit the membership counter at your local Costco or Contact Customer Service. View Costco's Return Policy Costco Concierge Services | Technical SupportFree technical support exclusive to Costco members for select electronics and consumer goods. Vitamin d3, also known as the sunshine vitamin, is important for strong bones and teeth.† vitamin d3 also plays a major role in healthy cell development and helps keep the immune system strong.† d3 has been shown to promote muscle health, breast health and colon health. Ingredients Soybean Oil, Gelatin, Glycerin, Water, Corn Oil, Caramel (Artificial Color), Cod Liver Oil, Vitamin D3 (Cholecalciferol).
6 x 5 x 4 inches ; Shipping Weight: 6.4 ounces UPC: 811845602539 890697433942 096619393916 Item model number: 393914 #4,386 in Health & Personal Care (See Top 100 in Health & Personal Care) in Health & Personal Care > Vitamins & Dietary Supplements > Vitamins > Vitamin D > D3 5 star78%4 star13%3 star4%2 star1%1 star4%See all verified purchase reviewsTop Customer ReviewsGreat value for D3|Kirkland bulk pills for the win!|Foul smelling upon opening; unable to return due to seller return policy|Great item and quality. I've re-bought several times.|My Vitamin D Levels are Normal Now!!!!|For the price absolutely NO competition|Order these during the cooler months.......... to avoid clumping| See and discover other items: vit d, vitamin d3 4000 iuOne serving of Kirkland Signature Extra Strength Vitamin D3 measured 2200 IU of vitamin D3, 10% over its label claim. Due to higher than claimed levels of vitamin D, two servings of this product also exceed the 4000 IU daily Upper Limit (UL) by 10%.
Side effects as an overall problemOur latest tests yield some good news for the many people who take a daily vitamin D pill, or one that combines calcium and vitamin D: All of the 32 products met or exceeded their claimed levels of the vitamin, disintegrated or dissolved properly where applicable, and were well below the safe upper limit set by the Institute of Medicine. But we found levels of lead in nine of 12 supplements that combine vitamin D with calcium that would have triggered warnings for reproductive risk under California Proposition 65. However, a number of companies had reached a settlement with the California Attorney General's office that allows them latitude in how they count lead levels and in these cases the products do not have to have warnings. Still, Consumer Reports continues to believe that it is better to choose products with lower lead levels. (This information has changed from the originally published version. See below for a clarification.) Click here for a chart that shows average lead levels in supplements we tested.
We also found that costs can vary widely, as shown in the Ratings chart. So choose by price and preference of pill type, and consider whether you want a product that also contains calcium. Finally, it's not clear that everyone who takes vitamin D needs the pills. People who get enough midday sun in warmer months probably don’t need extra amounts, since the body makes from exposure to sunlight. But you might need vitamin D if you have osteoporosis or a condition such as celiac disease that impairs the body’s ability to absorb fat-soluble vitamins, including D. For details, see our article "Do You Really Need More Vitamin D?" For our tests, at least three samples of each product were analyzed for their level of vitamin D3 (the form of the vitamin most were claimed to contain) and, in the case of the combined products, their level of calcium. The supplements with calcium were also tested for the presence of arsenic, cadmium, lead, and mercury. Average vitamin D3 levels ranged from 105 percent to 141 percent of the labeled amount in the adult and children’s vitamin D-only products (1,000 international units, or IU, and 400 IU, respectively).
But even the higher levels were well below the Institute of Medicine’s maximum safe daily level of 4,000 IU. Most adults up to age 70 need no more than about 600 IU of vitamin D a day; older people, 800 IU. Avoid exceeding 4,000 IU daily unless your doctor has prescribed a higher dose to treat a deficiency. Too much vitamin D can cause kidney damage. Other symptoms of toxic amounts of D include confusion, nausea, and weakness. Few foods naturally contain vitamin D. Fatty fish and cod-liver oil have the highest levels. Smaller amounts are available in beef liver, cheese, and egg yolks. Most of the vitamin D consumed in the U.S. diet comes from fortified foods, such as milk. Calcium-Vitamin D Supplements: Average Total Lead Levels in Samples Tested* (Listed in order of lowest to highest per maximum daily dose) Label recommended maximum dose (pills/day) Total analyzed micrograms of lead per labeled maximum daily dose Nature's Bounty Calcium 1200mg Caltrate 600 + D
Citracal Petites Calcium Citrate + D3 Oscal Calcium Supplement Extra D3 CVS Calcium 600 + D Walgreens Calcium 600 + D Equate Calcium Citrate + D (Walmart) Kirkland Signature Calcium 600mg + D3 (Costco) *At least one sample from each of three batches (lots).Let the Sun Shine! Vitamin D3 is not naturally present in very many foods, you get it from being out in the sun, so if you work indoors and don't do a lot of outdoor activities or live in a place where it rains a lot you probably do need a supplement. Vitamin D3 promotes health bone growth and formation so without sufficient vitamin D, bones can become thin, brittle, or misshapen. Vitamin D also helps to prevent rickets in children and osteomalacia or osteoporosis (along with calcium supplements) in adults and has other roles in your body including modulation of cell growth, neuromuscular and immune function, and reduction of inflammation. Always consult your MD about possible interactions before starting any new medicines.
The product arrived in a timely manner and in perfect shape, 5hough I'm not a lover of bubble wrap. Of course, how are any of us to know the quality or effectiveness of the supplements we buy? Still, must have are D, especially women for bone density retention and people with MS. It has been found that many people with MS have very low D count. Vitamin D3 is a nutritional product that helps a human build better levels of engerysunshine when there is NO sunny days. Expense wise Kirkland is lower price at 1/3 of the prescription rate. My PCP helped me understand not to waste my money on a branded prescription when D3 at 2000IU is much better my energy level is ten time better overall. I am 72 yrs old and the old branded prescription brand was too low in IU's and did not cut it, I had a much higher cost. Most days I am full of pep and ready to start another wonderful day. Important nutrient for the body Vitamin D is a must need for your body. This is a good buy and the cost is great!