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Vitamin A, D, E & K Products

Nutri-Link has been at the forefront in delivering you the new research about the fat-soluble vitamins A, D, E & K all of which have been the subject of important research in the past 5-6 years, in particular.  Vitamin A[1]. Vitamin D[2]. Vitamin E[3]. Vitamin K[4]. With Allergy Research’s long-standing reputation for antioxidant formulae and Biotics Research’s fully emulsified vitamins in liquid form we have the range of Vitamins A, D, E & K in varying doses to meet all your patient’s needs.

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Individuals consuming more than 2,000 IU/day of vitamin D (from diet and supplements) should periodically obtain a serum 25-hydroxy vitamin D measurement. Do not exceed 10,000 IU per day unless recommended by your doctor. Vitamin D supplementation is not recommended for individuals with hypercalcemia (high blood calcium levels). People with kidney disease, certain medical conditions (such as hyperparathyroidism or sarcoidosis), and those who use cardiac glycosides (digoxin) or thiazide diuretics should consult a physician before using supplemental vitamin D.


  1. Mactier H, Weaver LT. Review: Vitamin A and preterm infants: what we know, what we don’t know, and what we need to know. Arch Dis Child Fetal Neonatal Ed 2005;90:F103-F108. View Abstract.
  2. Vasquez A, Cannell J. Letter – Calcium and vitamin D in preventing fractures. Data are not sufficient to show inefficacy BMJ 2005;331:108-109 (9 July). View Abstract.
  3. Dietrich, M, PhD, Traber, MG, PhD, Jacques, PF, DSc, Cross, CE, MD, Hu Y & Block, G, PhD. Does -Tocopherol Play a Role in the Primary Prevention of Heart Disease and Cancer? A Review. Journal of the American College of Nutrition, Vol. 25, No. 4, 292-299 (2006). View Abstract.
  4. Kalkwarf HJ, Khoury JC, Bean J & Elliot JG. Vitamin K, bone turnover, and bone mass in girls. American Journal of Clinical Nutrition, Vol. 80, No. 4, 1075-1080, October 2004. View Abstract.