Is there a difference between vitamin d and vitamin d-3?

General vs specific. Vitamin d supplements are either vitamin d2 (ergocalcipherol) or vitamin D3 (cholecalcipherol). D2 is plant derived and D3 is animal derived. Some believe they are equivalent to one another, but most vitamin d authorities and studies i've found say that D3 is more bioavailable, which means the body uses it better. There has been an explosion of information about vitamin d in the last 15 years.
Yes. Vitamin d has two forms, d2 and d3. D3 is generally the form that most people benefit from. D2 works as well, but is the plant based form. If you are curious, many labs and doctors now offer the ability to measure your vitamin d level at a reasonable price and you can see if your supplement is working for you. There are lots of crummy supplements out there.

Related Questions

What age can children take vitamin d 3?

Vit d3. All parents are advised to give their newborn babies vit d. 400 IU of Vit D3 is recommended daily for newborns. Read more...
Infancy. Vitamin D is a considered a necessary supplement in the first few days of life if an infant is being solely or partially breastfed. The American Academy of Pediatrics suggest 400 IU per day for these infants as well as infants receiving less than 32 oz per day of Vitamin D fortified formula. Read more...

What are the health benefits of vitamin d 3?

Multiple. Vitamin d3 has many benefits. Keeps bones strong, improves immune function, impoves mood. In northern climates, above lattitude of cincinatti, everyone should probably supplement with vitamin d3 in the fall, winter and early spring. Read more...

What is the relation of vitamin d (3) and cortisol? (i'm having a hard time understanding pubmed, etc. Articles.)

Pub Med`. Is highly technical and is for docs. We now know that vitamin d affects every cell in the body. It has no direct relation with cortisol except that cholesterol is used, by the affect of sunlight on the skin, to make vit d and is also used to make cortisol. Read more...

How much ccalcium, vitamin E and vitamin d-3 should I take daily?

It depends... How much calcium depends on your diet ; type of calcium you take; with a healthy diet you may not need any (leafy greens are best source). 400 mg of calcium citrate can be as well-absorbed as 1200 mg of calcium carbonate. 400 iu of e is reasonable but only natural e with mixed tocopherols. 5000-8000 iu of d3 fall ; winter, maybe none spring ; summer if you get sun. Take 1000 mcg of k2 with d. Read more...