There is lots of research out now on vitamin D. It is actually a hormone and not a vitamin. It was misclassified as a vitamin when it was first discovered. You have vitamin D receptors all over your body proving it has influence on many biological processes. As time goes on science will learn more of what it does but below are just a few know positives about maintaining a high vitamin D level: It is an important immune system modulator. It is also important in helping calcium get into the bones and teeth. It helps insulin get into the cells slowing or preventing insulin resistance. It has been shown to reduce the risk of colon, breast, bladder, and thyroid cancer. It has been shown to reduce the risk of stroke. It can slow the onset of autoimmune diseases. It can help Most people to supplement. Especially those who can not get enough vitamin D from sun exposure. This is especially true of those living in Colder claimants as the angle of the sun is too shallow to be effective in receiving enough uv-b radiation needed to make D. You should get your Vitamin D levels measured every year at your annual physical with a 25-hydroxy vitamin D test. You may be surprised how low your level is. Most functional medicine doctors and ND's agree that a healthy level should be 50-100 ng/ml. Many lab ranges are 30-80. So be aware of this discrepancy. Many MD's still do not measure it and those that do subscribe to out dated lab ranges. It is best absorbed with your largest meal of the day and taking it with some fat helps in the absorption. This product is in olive oil (a very stable oil) which provide some fat. Beware of other D drops that are in less stable oils like sunflower oil. Oils like this can go rancid much easier. These drops are a very economical way to purchase your vitamin D and I have always been satisfied with Nature's Answers quality. If you found this review helpful, kindly visit my iherb home page for more value added reviews. "Yes" helpful votes are appreciated. Peace and good health
Posted by iHerb Customer on Mar 05, 2011 | Verified Purchase
I have had my vitamin D25 OH level checked regularly for over 3 years due to severe osteoporosis treatment. After I switched to this as my main source of D3, my blood level of D25 OH dropped unexpectedly. I do not trust this product and wish I had not been using it for over half a year. Brands I trust based on testing are Now and Life Extension.
Posted by iHerb Customer on Jul 04, 2013 | Verified Purchase
They get their vitamin d from china.
Posted by iHerb Customer on Mar 03, 2011 | Verified Purchase
I won't order again. No clear instructions on dosage....2 drops....that's too vague. How big of a drop. And the dropper was broken when I received it even though it was packaged very well.
Posted by iHerb Customer on Nov 18, 2015 | Verified Purchase
It just does not work.. how has this product got so many good reviews??? Cannot get the drops out of the stopper. Will never buy this again. Rubbish.
Posted by iHerb Customer on Aug 04, 2011 | Verified Purchase
Don't know if my bottle was just defective, but the supposed dropper it comes with doesn't even come up w/the lid when you open it, meaning I have to pry it off w/my nails to get 1 drop (dosage is 2 drops). I purchased a separate dropper to try to make it easier, but I wind up extracting either too much or too little...very frustrating...not worth the effort. Will never buy again. Prefer Now Foods, Vit. D-3, 2000 IU (also available @ iherb),just take 2 capsules instead...that works!
Posted by iHerb Customer on Mar 07, 2011 | Verified Purchase
But it's rrrreally hard to tell how many drops I am taking at a time, and I had to literally suck it out of the bottle. No idea if it is doing anything. Won't order again.
Posted by iHerb Customer on Dec 23, 2015 | Verified Purchase
Very disappointing. The first bottle had leaked, so was only half full. The next, is so slow with the drops coming out, it is killing our shoulders, holding it up.
Posted by zimari on Aug 22, 2017 | Verified Purchase
it is disgusting with no effect
Posted by iHerb Customer on Apr 27, 2017 | Verified Purchase
I don't know why this have so much positive reviews??!! The dropper dose not work, it is so hard to get even 1 drop out of there. The worst thing: if you take 2 drops per day it's supposed to last 240 days, and it was out in 2 months!!!! How it can be??? Never order this again!
Posted by iHerb Customer on Apr 07, 2016 | Verified Purchase
Could not find a previous supplier I ordered my vitamins from and chose to buy these from iherb which I thought were a reasonable price but I got the shock of my life when I was asked to pay both VAT and Custom Duty by DHLon delivery. Advice is if you are in the UK do not order this product as it will cost you double what you think.
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