Q. Are prunes high in vitamin K? I am on blood thinners and was told I need to limit vitamin K intake.
Vitamin B12 plays many crucial roles in the body. It is involved in neurologic function, red blood cell production, DNA synthesis, and a number of important chemical reactions. Vitamin B12 deficiency, while not common, can cause megaloblastic anemia (a disorder of the red blood cells that can cause symptoms such as fatigue, pale skin, and lightheadedness) and neurological and cognitive disorders.
A study published recently in JAMA Network Open found that very high intake of vitamins B6 and B12 from supplements (much higher than the Recommended Dietary Allowances) was associated with increased risk of hip fracture in women. In this prospective cohort study, 75,864 postmenopausal women in the U.S. were followed for 30 years.
A randomized controlled intervention trial published recently in the American Journal of Clinical Nutrition found that supplementation with vitamin D had no significant effect on depressive symptoms or physical functioning in older persons with low vitamin D status.
The B vitamin folate (B9) is found naturally in a variety of foods including vegetables (especially dark leafy greens), fruits and fruit juices, nuts, beans, peas, seafood, eggs, dairy products, meat, poultry, and whole grains.
Q. You seem to write a lot about supplements not being necessary. Arent multivitamins a good thing?
Image © Waldemarus | Getty Images The FDA recently unveiled the Dietary Supplement Ingredient Advisory List, designed to alert consumers to unlawful ingredients identified in...
Q. What is the most recent thinking on biotin?
Vitamin K was named for its role in coagulation (koagulation in German), but it turns out this important vitamin has significant roles beyond blood clotting. Work by Tufts researchers and others shows that vitamin K may be an important factor in bone health, cardiovascular health, and type 2 diabetes.
Q. Why dont I see vitamin A on my package of ready-to-steam frozen sweet potatoes?