Doctor insights on:
What Does Vitamin K Prevent
Bleeding: Vitamin k is a cofactor in humans' ability to clot. When we don't have enough we have the potential to have severe bleeding. That is why brand new babies receive a dose of vitamin k. Humans get most of their vitamin k from bacteria in their intestines although it also comes from some foods. ...Read more
Inhibits warfarin: Vitamin k is important for certain blood clotting factors in the body, and warfarin interferes with the way the body uses vitamin k. If someone ingests a large amount of vitamin k while on warfarin, it interferes with how warfarin works, thus putting the person at an increased risk of developing a clot. Conversely, if you stop all vitamin k, warfarin works too well, increasing bleeding risk. ...Read more
None: Vitamin c does not reduce, prevent or change anything about colds. This is one of those great health myths. I have seen at least one patient who was taking mega doses develop a severe rash that resolved when the person stopped it. Does taking a little extra hurt? Usually noit. Will taking a lot help keep you from getting a cold? Probably not. ...Read moreSee 1 more doctor answer
Manage stress: You ask about vitamins - the primary vitamins that have been cited as necessary to prevent gray hair are b-vitamins - b12, folate (folic acid) and biotin in particular. In my experience, the best gray hair prevention is stress management however. Learn how to not get frazzled. Meditate, do yoga, exercise, get enough sleep. Eat a healthy organic diet with lots of fruits and veggies. Don't go to med school. ...Read more
What it says: Vitamin toxicity means just that: too much of some vitamins can cause sickness. Some vitamins are relatively harmless in large quantities (albeit a waste of $) while others can cause serious damage. So - taking excessive amounts of vitamins is generally not a case of 'more is better'. ...Read more
Active hormone: Hi. Vitamin D per se has no direct effect in the body. Vitamin D is 25-hydroxylated in the liver. 25-hydroxyvitamin D is converted to the active hormone, calcitriol, in a tightly regulated step in the kidneys. Calcitriol is the active agent. It regulates gene expression in target tissues (gut, bone, muscle, etc). Calcitriol helps with calcium homeostasis, bone & muscle health, balance, etc. ...Read more
Calcium/Vit D3: You need sunlight to convert cholesterol in your skin to vit d3 which your body uses to bring calcium into the bones. Not enough calcium and your bones become brittle, not enough d3 and you get 'soft' bones/rickets which can lead to fractures. If you are low then take d3 wait one hour then eat 2 non fat yogurts 2x/day. Each yogurt gives 800mg of calcium. ...Read more
Vitamin d level is 16.6 nmol/l. What is the significance of this? What can cause it and what are the effects? How much vitamin d should I take daily?
See below:: Low vit d can cause fatigue, muscle pain/weakness, headaches, poor immune function, depression, increases risk of heart disease/cancer. We can get enough d from sun in spring ; summer but unless you live in the deep south all adults need to supplement in fall ; winter. Most adults need 5-8000 iu of d3/day ; a ; k-avoid d2! see http://bit.Ly/1fnt3ox ; http://bit.Ly/1ekkvkv ; http://bit.Ly/166dliq. ...Read more
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