I am a physician who not only prescribes this product but takes it as well. On the bottle itself it does not say how to take it. If you are deficient in Vit D by a blood test, you should take it once a week. If you do not know your Vit. D level, take it monthly. The reason for this is that too much Vitamin D can cause high calcium levels that can lead to kidney failure, constipation and mental status changes. Anyone who takes it more than once a week should do so under a physicians supervision. This product allows you to replenish your Vitamin D stores without taking a lot of pills which for most people is a real plus. The recommended daily dose is 1000 to 2000 units so this product allows you to get your monthly dose in one pill. It is also very cost efficient this way

I take Vit K2, Mk-7 with this product in a ratio of 10,000 units Vit D3 to 200 mcg of Mk-7 and finally my Vit D levels went up to normal. My anti aging doctor wants my blood levels at at least around 70-100ng/ml normally and up to 150ng/ml to fight disease processes like cancer. I have taken 10,000 units of Vit D for many years and until I used these products together, my levels were always around 25 ng/ml. I read a helpful book called, "Miraculous Results of High Levels of Vit D3 and Mk-7" by Jeff Bowles and learned this concept and a whole lot of documented history as to why conventional doctors talk about toxicity so much when the risk is very low and people are literally dying for lack of Vit D3. My whole body feels better, my hormones are more balanced, my bones are like a teenager's and aches and pains gone. The Mk-7 works to put calcitonin into the bones and teeth and not into the soft tissues which is the reason doctors are concerned with toxicity. At this ratio, I take 2-3 capsules a week and get these results. I found out that 85% of people are way deficient in Vit D and some have a mutated gene where the Vit D3 they take and the sun they get isn't converted to useable Vit D3 in their body...I am one of those. The Vit K2, Mk-7 is my answer! I also got rid of fibroid tumors and still have all my body parts

We don't understand why so many people (Medical Doctors included) continue to allege Vitamin D3 is toxic. Though D3 is not toxic, D2 [D(ERGO)] can be toxic (or is synthesized with dyes that can be toxic). This form of vitamin D3 is water-miscible; respectively, the body only absorbs and distributes what it needs; any excess is discharged. Though D2 can be harmful to kidneys; D3 promotes healthy kidney function. The benefits of vitamin D3 (and its lack of toxicity) has been well researched and reported with thousands of articles; not the least of which is the whitepaper written by: Dr. J. Joseph Prendergast, MD; titled: "Vitamin D3 Spray Whitepaper". The article is well written in layman's terms. Knowledgeable Health care practitioners wisely recommend that when supplementing a diet with D3 and K2 you should never take calcium supplements; just eat a normal healthy diet. In fact, for those that may experience pain in their extremities after taking large doses of D3, the culprit is not likely the D3; rather, they are most likely suplimenting calcium (which should never be done) it is actually hard not to get sufficient calcium if you have enough D3 and K2 (MK7). The body will produce 10,000 to 40,000 IU of D3 in 20 min of direct sun exposure (no more than that is recommended without sunscreen) after 20 min. the body reaches equilibrium; or, runs out of available cholesterol (which the body uses to naturally produce D3). The body can naturally produce 30,000 to 60,000 IU of D3 daily if two to three 10â€"20 min. periods (maximum of 20 min./period of exposure) sun exposure are evenly spread out across the day. If the body will naturally produce that much D3 in a day, how can it be harmful to take that much of a natural supplement of D3? I learned about D3 because my MD prescribed daily doses of 50,000 IU of D3 (I take 1- Bio-Tech D3-50 50,000 IU ), 700 mcg of K2 (I take 7- NOW Foods Vitamin K-2,100mcg )(K2 is a necessary D3 companion vitamin for proper assimilation of D3) and 20,000 IU of Vitamin A (I take 2- Solgar Vitamin A 10,000 IU )to fight a melanoma that developed on my ear lobe. That treatment is going quite well. Canada reported running a test with some of their school's children wherein they gave students a massive dose of 500,000 IU D3 at the beginning of the school year for each year for five years (the reported results were incredible). Again, all too often medical doctors treat D1, D2 and D3 as if they were the same thing, having the same effect. They are not the same and they do not have the same effect. D and D2 can be toxic; however, it makes no sense that D3 could possibly be. Just as there is a distinctive difference between vitamin D [ERGO] and vitamin D3, there is a significant difference between vitamin K1 and vitamin K2; K1 (usually synthetic) can interfere with high blood pressure medication treatments K2 does not (we only use the natural form MK-7 "menaquinone"; for example: NOW Foods Vitamin K-2,100mcg, 100 Vcaps ). The bottom line: people need to remember that medical doctors rarely get more that an introductory class in health in their normal training (if that); respectively, they are not generally trained in basic nutrition and/or health. Respectively, they are not generally the best source for learning about such matters. However, it is important to learn first, all you can about any nutritional claims from any source; especially if the source is promoting their own product. First, learn about the product, nutrient or supplement before taking anything; and, whenever possible use natural sources. In this case the best source for vitamin D3 is the sun. However, today it is -9°F outside; so, I am going to get my daily dose of 50,000 IU Vitamin D3 and 700 mcg Vitamin K2 from supplements

I have had serious discomfort due to reoccurring sinus- and lung infections every time I catch the flue or the common cold and also in the spring time when pollen is high. Last winter I had to take 5 rounds of antibiotics because of this. It does not seem to matter if I get the flue shot, I actually get sick from that sometimes and then still get the flu and I always get really sick, coughing and losing sleep for 2-3 weeks after each flu. I live on 64°N and my Vitamin-D level was low when I got tested. I did not get the flue shot this year and when ever I feel sickly that has happened 3 times since September I do "Stoss Therapy" [...] I've also taken one of these pills 2--3 times a month but I recently I changed to 5000IU daily as I would forget to take these. Long story short, I have not had a single respiratory infection or constipation since I started this in September 2010. I also notised that I have lost weight, I suddenly did not feel like eating sugar any more and I a hard core sugar addict! Perhaps this is because I sleep better since I breath better. This product rocks! I take one or two Calcium/Magnesium/Zink with my Vitamin D, http://www.amazon.co.uk/Solaray-Calcium-Magnesium-Zinc-Caps/dp/B004F80PU8/ref=sr_1_6?ie=UTF8&qid=1297265287&sr=8-

I have been taking Vitamin D3 for the longest time now because my work keeps me in doors when the sun is out. I started as taking D2 (the vegan vitamin D) at 5-10 thousand dosage, but my blood levels took forever to go up. I was prescribed 50,000iu of D2 once a week, and it took me 2 months to bring my vitamin D blood levels to go up significantly to acceptable levels. Once my 1,25 dihydroxycholecalciferol (most active vitamin D3) went up to normal level (60,000ng), i felt so much better- no more back pains and fibromyalgia-like discomfort. Then, I sort of fell off with my intake of vitamin D supplements and I suffered from brain fog, weakness/easy fatiguability and chronic joint and bone and muscle pains. A naturopathic doctor recommended to me to take 50,000iu of vitamin D3 once a day! At first I was really skeptic. Was the dosage too high? Would I become toxic? I went ahead anyway and took the 50,000iu once a day. After taking it for 2 months, my levels went soaring high (120,000ng ) and I got my "self" back. I could think with more clarity. I could work without too much pain. My vitamin D3 levels are kept within normal levels as I take this supplement WISELY. This is my second purchase of this product, and I am very satisfied about it. THIS REVIEW IS NOT TO PRESCRIBE TO ANYONE THE USE OF THIS SUPPLEMENT! I am just telling my story about my use of this product. As always, when taking supplements or medications, ASK YOU HEALTH CARE PROVIDER for advice

If you work indoors, odds are that you're deficient in Vitamin D -- even more so in the Winter, if you're dark-skinned, and the further away from the equator you live. This supplement is an excellent way to help correct your levels. Dr John Cannell at the Vitamin D Council has researched dose extensively, and found 10,000 IU per day to be safe over the long-term; the skin produces about that much Vit D in response to 20 to 30 minutes of summer sun exposure. However, correcting low blood levels often requires a higher dose, which is where this product comes in. You should only use it daily for one to three months, hopefully with a blood test every month or so to check your progress. Research shows that ideal levels are between roughly 60 ng/mL and 120 ng/mL (150 to 300 nmol/L). After your levels correct, to maintain them you can switch to taking either one 50,000 IU capsule per week, or 5,000 to 10,000 IU per day on days that you don't get plenty of sun. Low levels of Vit D have been associated with higher rates of cancer (including breast, ovarian, prostate, colon, kidney, endometrial and lymphoma), heart disease, diabetes, multiple sclerosis, and even the flu -- as well as lower rates of injury from falls and fractures. There is good evidence to suggest that adequate levels of Vit D can protect you from H1N1 as well or better than immunization. In fact, the Winter decline in Vit D has been implicated as one of the underlying causes of flu season. Another tidbit about getting Vit D from the sun: while sun exposure does increase the risk of certain skin cancers, those cancers are also the most curable forms. The flip-side is that limiting sun exposure reduces your Vit D level, which puts you at much higher risk for getting the really nasty, incurable cancers. Is the trade-off really worth it? Our Paleolithic ancestors certainly spent plenty of time in the sun

REMEMBER to take this with vitamin K2 (mk7), about 200 mcg of K2 is needed everyday with every 50,000 D3!!!!!!! This D3-50 is awesome at chasing off colds, flus, pneumonia and bronchitis for me within 3 days of starting it, I take 1000 units per pound of body weight everyday for three days, -thats right 200,000 3xs! I have emphysema and I can not let a cold take its course because in one day it progresses to pneumonia, but not anymore. Normally this just a once a week or twice a month dosage, my doctor wants me to take it three times per week but the corresponding K2 dosage I can not afford so I don't. Now, it MUST be taken along with vitamin K2 because K2 directs calcium in the body back in to the bones and all this D3 will have the calcium really flowing around and very ready to be absorbed by anyplace it can bind to - bad news for the brain and heart where it can harden the plaque in valves and arteries and extra calcium is a nightmare to the nervous system. So if you are not going to take K2 do not take D3 either. In nature the two vitamins come together in live fermented foods and fresh dairy but with the pasteurization process the K2 gets destroyed, so thats why you don't get enough in your foods to maintain good health

My Vit D levels were super low a couple years ago (who knew!). I was shocked when my doctor told me and I did a lot of reading and learned how important it is to keep Vit D levels normal. My doctor started me on "Stoss" therapy, which is one dose of 50,000 iu Vit D per week for 12 to 16 weeks. Vit D3 is really what one should take and NOT the prescription Vit D2 formula. So I ordered this product immediately and did not take the prescription Vit D my doctor wrote. Sometimes doctors do not know all they should! Anyway, blood retested after 16 weeks and my levels were normal, probably for the first time in years. I then read about a maintenance dosage of 1 pill (50,000 iu) every TWO weeks once normal levels have been achieved from the Stoss regimen, and that's exactly what I'm doing. My Vit D levels are maintained in the normal range, so I will keep this dosage going forever, unless something in my bloodwork changes. It's very important to get your Vit D levels tested at least a couple times a year. I get a battery of blood tests done every 4 months since I have other health issues to manage. This every other week dosage of 1 50K iu pill regimen works for me and is convenient. I have a reminder set in smartphone calender so I get pinged when the day arrives to take a dose. I take the pill with a meal, as recommended. No side effects whatsoever. Easy peasy. Oh and the size of the pill is really small. I thought I'd have to take a horsepill size capsule, but it's tiny, considering the amount of Vit D3 you're taking. Win

Not a doctor, but if you take 50,000 iu for each 50 lbs of weight you are, for 10 days, it will "FIX'' MANY if not most of your ailments. Example: 200 LBS person, would take 4 of the 50,000 iu's each day for 10 days. Not at once, try to spread it out throughout the day. Not sure of the reaction if taken all at once. Vitamin D is an immune Vitamin. Now go get healthy .. (i am not a doctor nor would I give any kind of professional advise on medical anything, this is just what I did becaus a doctor told me

I read the book Vitamin D3 Miracle by Jeff T. Bowels and was very impressed so decided to try this product. On one of the reviews, I read, I believe in the book Vitamin D3 Miracle, that a girl was taking (3) D3-50 a day along with Super Vit K2. I read online from several doctors that they had never come across VIT D Toxicity. Then along came COVID-19, so I thought, I would give it a try to boost my immune system. At first, I started out on 1 a day, after a month or so increased it to 3 a day. Another month later, I started to get sick with symptoms similar to COVID-19, except for no fever. I was tested and the results were negative. I continued to get sicker and a couple of days later told my husband I needed to go to the hospital. I was throwing up and super exhausted. When I arrived at the hospital, I found that my calcium levels were at 18. Those are the levels that create a coma and death, the doctors told me the high calcium levels were due to Vitamin D Toxicity. This also created high kidney numbers along with high blood pressure. 6 days later I left the hospital. We are still working to bring down my calcium, kidney, and blood pressure numbers. This is a painful and expensive lesson to me. I just wanted to warn anyone that this is a strong and powerful supplement and there is such a thing as Vitamin D Toxicity. Please be careful