It is essential to maintain healthy vitamin D levels throughout all stages of life, from fetal development to old age.* Vitamin D helps protect a number of important functions in the body.* The current recommended daily vitamin D intake of 400 IUs is based on the minimum allowance to protect against bone disease. However, an upward revision of the FDA´s guideline is now under consideration in light of new research, especially pertaining to immune function. Cutting-edge research suggests serum vitamin D levels should be in the range of 32-80 ng/mL 25-hydroxyvitamin D (25(OH)D). Although direct sunlight exposure is a good source of vitamin D, many people do not get enough sun due to season change, latitude, or lifestyle. Therefore, vitamin D supplementation can be of great benefit in these cases.
Vitamin D deficiency is quite common, particularly among the elderly. For example, a study conducted at a hospital in Glasgow, Scotland, found an almost universal vitamin D deficiency among a group of 548 elderly patients. Individuals deficient in vitamin D may need 5,000-10,000 IU of vitamin D daily to replenish tissue stores. With these individuals specifically in mind, Thorne´s D-5000 supplies 5,000 IU of pure vitamin D3 in each vegetarian capsule.
Some vitamins, because of their potency, are usually given in very small amounts. Examples of such "micro-dose" vitamins include vitamin D, vitamin K, and vitamin B12. Most dietary supplement manufacturers purchase "micro-dose" vitamins from raw material suppliers as premixed dilutions, meaning the vitamins (in powder form) are mixed with other powdered substances that in turn make it easier for the manufacturer to handle and mix a larger quantity of raw material. Unfortunately, the powdered substances used in these premixed dilutions frequently contain potentially detrimental ingredients such as lactose and also the preservatives BHT, BHA, sodium benzoate, and sorbic acid.
Important - Please read before purchase
While we try to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. For additional information about a product, please Contact Us on 0800 252 875.
Content on this site is for reference purposes and is not intended to substitute for advice given by a medical practitioner, pharmacist, or other licensed health-care professional. Discontinue use and consult a doctor if adverse reactions occur.
Information stated regarding dietary supplements is not intended to diagnose, treat, cure, or prevent any disease or health condition.
Keep out of reach of children. Store in a cool, dry place. Do not use if seal under cap is broken or missing.
Standard delivery (Orders under £20): £3 · Delivery time: 2-4 working days
FREE delivery (Orders over £20): FREE · 2-4 working days
We ship worldwide! Delivery times vary from 4-8 working days for Europe and 5-14 working days for the rest of the world. Flat rate delivery charges can be found here.