Vitamin K engages in a delicate dance with vitamin D; whereas vitamin D provides improved bone development by helping you absorb calcium, there is new evidence that vitamin K2 directs the calcium to your skeleton, while preventing it from being deposited where you don't want it -- i.e., your organs, joint spaces, and arteries. A large part of arterial plaque consists of calcium deposits (atherosclerosis), hence the term "hardening of the arteries."
Vitamin K2 activates a protein hormone called osteocalcin, produced by osteoblasts, which is needed to bind calcium into the matrix of your bone. Osteocalcin also appears to help prevent calcium from depositing into your arteries. In other words, without the help of vitamin K2, the calcium that your vitamin D so effectively lets in might be working AGAINST you -- by building up your coronary arteries rather than your bones.
This is why if you take calcium and vitamin D but are deficient in vitamin K, you could be worse off than if you were not taking those supplements at all, as demonstrated by a recent meta-analysis linking calcium supplements to heart attacks.
This meta-analysis looked at studies involving people taking calcium in isolation, without complementary nutrients like magnesium, vitamin D and vitamin K, which help keep your body in balance. In the absence of those other important cofactors, calcium CAN have adverse effects, such as building up in coronary arteries and causing heart attacks, which is really what this analysis detected. So if you are going to take calcium, you need to be sure you have balanced it out with vitamin D and vitamin K.
Lol, hermits.
Take a multi, go outside.
Any suggestions for the best quality vitamin D supplements?
Also, something to look into, from some random research I did I found out that vitamin k (more specifically k2) is important when supplementing vitamin D otherwise you may be doing yourself harm.
Its hard to overdose on D3 as your body only uses what it requires.
Overdose has been observed at 1,925 µg/d (77,000 IU per day)
Excessive exposure to sunlight poses no risk in vitamin D toxicity through overproduction of vitamin D precursor, cholecalciferol, regulating vitamin D production.
The 4,000-IU cut-off was determined by the Institute of Medicine in 2010 after reviewing the then-current medical literature, finding that the dose for lowest observed adverse effect level is 40,000 IU daily for at least 12 weeks,http://en.wikipedia.org/wiki/Cholecalciferol#cite_note-pmid10232622-8
You shouldn't be taking multivitamins unless you are severely deficient in that vitamin. Even then you should be doing everything in your power to try to get that vitamin naturally. There have been a bunch of studies that show that taking vitamins in pill form generally do more harm than good.
I'm surprised a lot of the crazy health conspiracy theorists on this form get all riled up about toothpaste while taking a multivitamin every day.
The only nutritional supplement I'd ever consider taking is Omega 3, but I've replaced that by eating wild caught salmon every day. And incidentally, a serving of salmon also has plenty of vitamin D in it.
An advantage to taking Omega 3 supplements versus eating fish is you have much more control over the amount of mercury you're consuming. I eat fish nearly everyday and give few fucks about mercury but it's something to think about.
The only nutritional supplement I'd ever consider taking is Omega 3
I only eat wild caught Alaskan salmon, which has virtually no mercury in it.
WHFoods: How safe is salmon with respect to mercury?
FAQs - Pure Alaska Salmon Co