If there's only one supplement you're taking for your health and your diet is decent, it should probably be Vitamin D. I highly recommend taking Vitamin D instead of a multivitamin most of the time. The standard supplement is Vitamin D3, otherwise known as cholecalciferol. Vitamin D3 tends to be better absorbed than other forms of Vitamin D. Vitamin D is an essential vitamin known as the sunlight vitamin, due to synthesis occurring in the skin from the sun's radiation. It has a multitude of benefits to the body including supporting bone structure, mood state, and is generally seen as healthy and anticancer. The RDA for vitamin D is currently set at 400-800IU/day, but this is likely too low for adults. The safe upper limit in the United States is currently defined as 2,000IU/day, and in Canada it's 4,000IU/day. However, research suggests that the true safe upper limit is 10,000IU/day. Supplemental vitamin D is implicated in wide-ranging benefits, such as increasing cognition, immune health, bone health, and well-being; reducing the risks of cancer, heart disease, diabetes, and multiple sclerosis; and increasing testosterone levels in deficient populations. This product by 21st Century Health Care offers a cost-effective supplement for the benefits mentioned above. Taking everything into account, I highly recommend this high quality product. I hope you'll find my review helpful to you. I am a strong advocate on scientific medical research and evidence-based information, and constantly want to differentiate between marketing hyperbole and real world effects. If you like my review, please kindly click ‘Yes’. And also, please feel free to check out my page for more reviews by clicking my name 3827GreenWood at the top of this review. Best wishes and good health to everyone!
Posted by NBPT10 on Oct 28, 2013 | Verified Purchase
Much has been written about the Benefits of Vitamin D3. Therefore I will not go very deep here. I will say most adults living in the North or those who don't spend much time outside need to supplement. Certain medications will lower you D levels as well. Vit D is a HORMONE and not a vitamin. Therefore you want just the right levels in your body. Not too much and not too little. This is critical to understand so I always tell people to have your doctor test for your levels every year. Don't go by the lab range alone and feel you are ok. Most labs have a lower limit that is too low. Most progressively thinking doctors agree that you should be between 50-100 ng/ml on a standard 25-OH Vitamin D test. By maintaining this level you will be helped in many areas of your overall health. i.e. Immunity, bone health, cognition and much more. This is a good product in general and great when iHerb has it on special and you can get it for free or for a $1. Don't miss out when it is on special. I don't know why they call it EXTRA strength when it is only 1,000mg. That is a low to average dose for most adults. Take you vitamin D with some fat for better absorption. A recent study showed it is best absorbed with your largest meal of the day. I don't use this product typically. There is another brand in a liquid form which I feel is better absorbed and a better overall deal. If you go to my iHerb web page by clicking on my blue handle above you will see my recommended vitamin D as well as many other value added reviews. If you found this helpful kindly click on the "YES" button. Peace and good health!
Posted by eathealthy on Dec 28, 2013 | Verified Purchase
These tablets are easy to take, just one a day to enhance immunity and prevent cancer. I do prefer to take a liquid vitamin D supplement such as D drops. Plus the drops taste better. This bottle was a freebie but wonèt purchase again. If you like my review check out my page by clicking eathealthy in blue above to see reviews of all the products I have purchased from iHerb!
Posted by iHerb Customer on Apr 09, 2016 | Verified Purchase
Posted by Kahaliah on Aug 07, 2015 | Verified Purchase
(Sorry for my bad English !) Didn't use it since I saw what it contains so I can not tell if it's good or not.
Posted by iHerb Customer on Dec 13, 2013 | Verified Purchase
free but wait for result
Posted by iHerb Customer on Oct 27, 2013 | Verified Purchase
Got them for free, and thats about it. Low dosage may be helpful for newbies to D-vitamine. It was a nice gift, but Im taking at least 5000IU a day during the winter months.
Posted by iHerb Customer on Feb 18, 2018 | Verified Purchase
Posted by iHerb Customer on Jan 31, 2018 | Verified Purchase
This product is good.
Posted by iHerb Customer on Dec 29, 2016 | Verified Purchase
I did not notice a difference with this supplement.
Posted by martaekos on Mar 04, 2016 | Verified Purchase
No sé si lo compré o lo probé en un "Trial", seguramente esto último y seguramente por algún motivo que no recuerdo. Lo de siempre: "Las vitaminas no solucionan problemas que no sean ocasionados por las carencias de ellas mismas". Si las tomé no lo recuerdo: ni cuándo, ni cómo, ni por qué xD