Show all reviewsGREAT FOR MSSize: 2 oz|Very Effective, Easy to Use!I'll be using this one for life...!Good stuff, disappointing dropper sealSize: 2 oz|This is a nice alternative to pills if you're looking for a vitamin ...If you are over 25 and North of the 40th parallel, you need this!Good supplement, faulty dropperSize: 2 oz|The product is misrepresented.The first time the dropper worked fine. Second to the last bottle the plastic around ...Highly recommended for entire familySize: 4 oz|←Previous...Get fast answers from reviewers See all 24 answered questions Customers also viewed these itemsNow Foods Ex Str Liquid Vitamin D-3 1,000 IU Drop, 1 Ounce101NOW Foods Liquid Vitamin D-3 400Iu/4 Dropper, 2 ounce (pack of 2)24Solgar Liquid Vitamin D3 Cholecalciferol 5000 IU - Natural Orange Flavor, 2 Oz Count, 2...93Optimal Vitamin D3 Liquid | 2,000 IU Per Drop | 978Source Naturals Vitamin D-3 Liquid 2000IU, Bioactive Form for Bone and Immune Health107Need customer service? Optimal levels of vitamin D during pregnancy
More than 60 years ago, based on the science of the time (science that has stagnated for 60 years), Dr. E. Orbermer of Italy wrote the following: “Until further experimental evidence, adequate and incontrovertible, is made available, I submit that we should play for safety. In a climate like that of England every pregnant woman should be given a supplement of vitamin D in doses of not less than 10,000 IU per day in the first 7 months, and 20,000 IU (per day) during the 8th and 9th months.” OBERMER E. Vitamin-D requirements in pregnancy. Br Med J. 1947 Dec 6;2(4535):927. The “adequate and incontrovertible evidence” that Dr. Orbermer wanted, to a certain extent, is finally here, 60 years later. As it has to do with developing human beings, it could not be more important. The study is the highest standard of proof, a randomized controlled trial, conducted by Professor Bruce Hollis and colleagues at the Medical University of South Carolina. They took 350 pregnant women, gave 1/3 of them 600 IU/day, 1/3 of them 2,000 IU/day, and 1/3 4,000 IU/day.
Then they waited to see, among many things, which group would produce infants with at least 20 ng/ml of vitamin D in their blood, the lowest limit the 2010 Food and Nutrition Board (FNB) says is needed for good fetal health. Hollis BW, Johnson D, Hulsey TC, Ebeling M, Wagner CL. Vitamin D supplementation during pregnancy: double-blind, randomized clinical trial of safety and effectiveness. J Bone Miner Res. 2011 Oct;26(10):2341-57. Surprise surprise, only the 4,000 IU/day pregnant women group even approached the minimal safety level of 20 ng/ml in their infants. Furthermore, the 2010 FNB recommendations of vitamin D in prenatal vitamins would have left 50% of the White women and 80% of the Black women with fetuses below 20 ng/ml. However, Professor Hollis found something else, something potentially much more important. He found that the average fetus in the USA is starved for enough building blocks for his or her mother to make adequate activated vitamin D to ship to the baby;
activated vitamin D that is probably used for microscopic organ development, such as in the brain. Activated vitamin D in pregnancy is mysterious. It appears the mother makes it in her kidney (maybe some in her placenta) at levels up to 3 to 4 times normal (without maternal hypercalcemia) and ships it across to the fetus. This only happens if the mother has enough of this vital steroid hormone in her body to ship to the fetus and most mothers do not. If she can’t make it, she can’t ship it maximally, and the 38 fetal organs depending on activated vitamin D to fully develop must do the best they can do with inadequate amounts of this steroid. Of course, none of this applies to mothers who frequently sunbathe, or who take 5,000 IU/day while they are pregnant. To quote Professor Hollis: “These findings suggest that the current vitamin D (requirements for pregnancy, currently 600 IU/day) issued in 2010 by the Food and Nutrition Board should be raised to 4,000 IU of vitamin D per day so that all women, regardless of race, can attain optimal nutritional and hormonal vitamin D status throughout pregnancy.”
The Vitamin D Council agrees and considers this an important study in support of why adults and pregnant women need at least 4,000 IU/day to elevate blood levels and improve fetal health and birth outcomes. Although there are no trials that support taking more, the Vitamin D Council believes 5,000 IU/day is equally safe and would be more effective at maintaining adequate fetal blood levels of vitamin D.The following (2009? 2010?) has just a few hyperlinks of the original great article by Kerri Knox Doctors seem to have a fear of recommending ANY amount Vitamin D for fear of causing Vitamin D toxicity. But while Vitamin D Toxicity IS a reality, it is a rare phenomenon to have a Vitamin D toxicity. Interestingly, it seems like EVERYONE is always concerned about taking excess Vitamin D- while almost no one is aware of or even slightly concerned about an: Overdose on Selenium or Overdose on Magnesium However, selenium toxicity is MUCH more common that Overdose on Vitamin D.
And while Selenium Overdose can occur in nature- an overdose on Vitamin D NEVER occurs with naturally occurring vitamin d in Vitamin D Foods or Vitamin D From Sunlight. Who is at risk to overdose on Vitamin D? Anyone who takes Vitamin D supplements CAN take too much Vitamin D. But the majority of documented overdose on vitamin d are from: These categories comprise nearly all people who have had an Overdose on Vitamin D. Most governments have set a 'Tolerable Upper Limit' also called a 'safe upper limit' dosage for vitamin d supplements. This is a dosage in which healthy people can take for extended periods of time with few to no vitamin d overdose symptoms. Currently, the Tolerable Upper Limit is Vitamin D 2000 IU per day. Vitamin D research shows that this 'upper limit' of Vitamin D 2000 IU per day SHOULD be the Recommended Daily Allowance for vitamin d therapy - NOT the Tolerable Upper Limit. And this dosage is certainly not anywhere near getting excess Vitamin D.
The researchers state that the tolerable upper limit of 2000 IU's is a great daily dose for vitamin d therapy for children, but that it has no basis in any science for an upper level for adults and is not in any way excess vitamin d since the levels required for Symptoms of Vitamin D overdose are at least 5 times that much In fact, Vitamin D Scientists have come together with this 'Call to Action' letter to induce the North American governments to make the use of Vitamin D 2000 IU as the baseline minimum requirement for all healthy adults. "The conclusion was that the UL (safe upper limit) for vitamin D consumption by adults should be 10,000 IU/d. This indicates that the margin of safety for vitamin D consumption for adults is (more than) 10 times any current recommended intakes." -Vieth et al, 'The urgent need to recommend an intake of vitamin D that is effective' Other studies agree that current guidelines are not based in fact. The Research Article The Pharmacology of Vitamin D, Including Fortification Strategies states that there is "no evidence of adverse effects from taking 10,000 IU of Vitamin D a day".
They go on to state, "...cases of vitamin D toxicity with hypercalcemia, for which the 25(OH)D concentration and vitamin D dose are known, all involve intake of (greater than or equal to) 40,000 IU/d." That's Forty Thousand IU's per day to produce a true Overdose on Vitamin D with the required Elevated Calcium levels to go along with it! That's NOT what doctors and governments are telling us, so doctors give us inadequate amounts of Vitamin D in order to prevent a nearly fictitious possibility of overdose on Vitamin D! Another study gave pregnant women 100,000 IU's per day for the entire length of their pregnancy. The study concluded,"Thus, there is no evidence in humans that even a 100,000 IU/d dose of vitamin D for extended periods during pregnancy results in any harmful effects." In another study entitled, 'Vitamin D toxicity, policy, and science' the author states, "a prolonged intake of 250 mug (10,000 IU)/d of vitamin D(3) is likely to pose no risk of adverse effects in almost all individuals in the general population;
this meets the criteria for a tolerable upper intake level." Be SURE that you understand that feeling bad after you take vitamin d is almost surely NOT an overdose, but simply Vitamin D Side Effects. They are NOT the same thing although they are VERY often confused. Please read the page on Vitamin D Side Effects if you feel bad after taking vitamin d because there are ways that you can resolve that. But if you have been taking MASSIVE doses of vitamin d, then the Vitamin D overdose symptoms that might make you seek medical attention if you are taking large amounts of Vitamin D Supplements are: The presence of a High Vitamin D Level WITH anElevated Calcium in the blood is really the only useful test for overdose on Vitamin D as there is a wide variation in how people tolerate upper level limits of the Vitamin D blood test. If you have high calcium levels already, that is one of the few Vitamin D Contraindications and you must NOT take vitamin d supplements unless you are specifically told to by your doctor.
While high Blood Calcium Levels are useful to determine an overdose on vitamin d, it really takes an AMAZINGLY large amount to cause a Vitamin D Overdose. In fact, in East Germany between the 1940's and 1960's, children would ROUTINELY get 6 doses of 600,000 IU's of Vitamin D between birth and 18 months old. This gave these small children an incredible 3,600,000 IU's of Vitamin D in 18 months. That is Three Million Six Hundred Thousand IU's in 18 months in small children as a ROUTINE hospital procedure for several decades!! A study called Intermittent High Dose Vitamin D During Infancy questioning this practice's safety noted that, while many of the children developed transient high levels of blood calcium levels, "...all the infants appeared healthy and repeated inquiries... have failed to identify clinical vitamin d toxicity as a result of the prophylactic program...". Also, it is a common practice for doctors around the world to use a therapy for rickets in infants and children a Vitamin D Therapy called 'Stosstherapy' which gives these children with rickets a one-time Vitamin D Injection of 600,000 IU's.