Jarrow Formulas Vitamin D3 125 mcg (5000 IU) - 100 Servings (Softgels) - Bone Health, Immune Support & Calcium Metabolism Support - Vitamin D Supplement - D3 Vitamins - 5000 IU Vitamin D - Gluten Free

great vitamin at a decent price too

My doctor prescribed me to take the Vitamin D3 5000 IU supplement daily. IU means International Unit and the actual value of each IU depends upon the type of vitamin. For Vitamin D 1 microgram of Vitamin D is equal to 40IU.These are softgel capsules. They look like normal gelatin based softgels and are golden yellow in appearance.WHAT IS VITAMIN DIn the early 20th century scientists were trying to find a vaccine/cure for rickets. Cod liver oil was found to prevent rocket and it was assumed that Vitamin A (in the cod liver oil) was responsible for curing rickets. However, upon further research it was found that cod liver oil was able to cure rickets even if the Vitamin A was removed from the cod liver oil. It was then realized that the substance responsible for curing rickets was different than Vitamin A and it was named as Vitamin D (since this was fourth vitamin to be discovered.) Vitamins were given generic names (A,B,C,D) because the exact chemical composition names of these vitamins were not known. thus they were given generic names.Vitamin D helps the body to absorb calcium, magnesium, and phosphate. Deficiency of Vitamin D can cause bone issues such as rickets, osteoporosis (weak bones), osteomalacia (bone pain)Generally to check the levels of Vitamin D a bllod test is done called as 25-hydroxy vitamin D test . Healthy people have Vitamin D levels between 20 ng/mL (nanograms/milliliter) to 50 ng/mL.WHAT IS VITAMIN D3Upon further research there were different forms of Vitamin D found, Vitamin D1, D2, D3, D4, D5. They have slightly different compositions but have same effect on the body. Vitamin D3 is chemically known as calciferol.HOW DOES BODY GET VITAMIN D3Most of the Vitamin D in body is generated by body itself by a process that is triggered by exposure to sunlight. The epidermal layer of our skin contains 7-Dehydrocholesterol which is a precursor to vitamin D. When the sun’s ultraviolet rays touch the skin, they convert 7-Dehydrocholesterol to a molecule called vitamin D3 or cholecalciferol.This vitamin D3 or cholecalciferol is an inactive form (meaning that body cannot use it yet.) Liver and kidney help to convert cholecalciferol to an active/useful form by converting it to calcifediol and calcitriol respectively. calcitriol is the form of Vitamin D that body can use.So, if body is not able to get exposure to sun, then vitamin D3 or cholecalciferol cannot be synthesized. The Vitamin D3 supplements can help in this. Once the body gets Vitami D3 supplement, body can convert it to an active/useful form of Vitamin D.There are also other food sources of Vitamin D such as Lichen, cod liver oil, salmon, egg yolk. But some amount of Vitamin D is lost depending upon how food is cooked and it is difficult to absorb Vitamin D from food sources as well. Some other food items are also fortified with Vitamin D such as milk.VITAMIN D DOSAGEWhen atmospheric conditions are ideal and skies are clear, 30 minutes of whole-body exposure of pale skin to sunlight without clothing or sunscreen can result in the synthesis of between 10,000 and 20,000 IU of vitamin D. These quantities of vitamin D are large, and therefore capable of supplying the body's full needs.However, if you are in a line of work like me where I spend most of my time inside, getting sufficient exposure to sun is difficult. Also, lass blocks theFor normal healthy adults between 9-71 years 4,000 IU per day is considered to be tolerable upper limit. However, depending upon the level of deficiency Doctor might prescribe a higher dose.VITAMIN D OVERDOSEBody can regulate the generation of Vitamin D, but taking too much of Vitamin D supplements can cause issues. The maximum amount of Vitamin D

Great for support your bones, overall health

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Easy to swallow. Great quality. Bobby Approved, is you use that app.

5k is a good amount. I can take less or more, along with Cal, Mag, Zinc & with Vit K-2.

I feel more energy. my vitamin D is low so in February when I get lab work done I'll see if it really shows in my numbers. Fingers crossed.Update: 2/21/25 my Vitamin D level has increased within a normal range after 1 month of use. I highly recommend this product and will continue buying it

I like that the are easy to swallow