Intensive Nutrition® uses only the highest quality raw materials from reputable raw material vendors. Throughout our 40 years in the industry, we have established many long-term relationships with raw material suppliers and have, as a consequence, access to and can request only the best from our sources. To ensure quality, we rely on the analysis certificate from our suppliers for identification and then verify the certificate with our own testing performed at our in-house laboratory facility. We conduct solubility testing, melting point and infrared testing on our raw materials as well as on some of our finished products.

Manufacturing, like cooking, is an art. The manner in which raw materials are combined, that is, how they are compounded, significantly impacts a products' efficacy and bioavailability. For example, it takes approximately two months for Intensive Nutrition® to manufacture a single batch of our Professional Multivitamins, Multi-VM and Mega-VM. At the earliest stage, fat and water soluble materials are separated and then later combined at specific intervals. The mixture is dried, the tablets manufactured and then dried and water coated over several weeks. What results are pristine tablets without paint coating that, as a consequence of their manufacture, are able to target the small intestine when ingested (what we call "target release") and exert superior bioavailability. Our multivitamins, like our entire product line, are subject to precision compounding methods which ensures stability, efficacy and bioavailability of the product.

What is bioavailability? Bioavailability is a term used in pharmacology. It essentially defines the extent to which a compound reaches systemic (all over) circulation and is available to the body at the point of absorption. For dietary supplements, Intensive Nutrition® uses the term bioavailability to define products that have been manufactured for maximum absorption by the body. Intravenous delivery offers 100% bioavailability, however, as dietary supplements can not be delivered in this manner (without being classified as drugs), Intensive Nutrition® strives to come as close as possible to maximum bioavailability by defining method of delivery and/or product composition.

For example, Intensive Nutrition® manufactures Vitamin B12 hydroxycobalamin & methylcobalamin as "under-the-tongue" or sublingual supplements. Under-the-tongue delivery, or buccal delivery, is very important for Vitamin B12 because it is easily destroyed by stomach acids. Buccal absorption, absorption through the cheek, allows for B12 to become absorbed directly into the bloodstream, bypassing the stomach. To enhance absorption further, Intensive Nutrition® adds betacyclodextrin to its hydroxycobalamin formula in addition to folic acid. In its 3 mg methylcobalamin formula, INI has added 1 mg of folic acid to create a complete and comprehensive B12 supplement.

Another product, Intensive Nutrition's Folixor® folic acid, exemplifies how unique composition leads to superior bioavailability. Folixor®, a high potency folate, is under-the-tongue and also contains other nutrient adjuvants (B12, B6 and Vitamin C). However, what makes Folixor® a truly exception folic acid supplement is the addition of L-Leucine, and amino acid that surprisingly boosts absorption!

Due to their immense nutrient content, vitamins (specifically multivitamins) are always susceptible to bacterial contamination. Intensive Nutrition® ensures long-term shelf life for its products by utilizing precise compounding methods (as described above) and by adhering to the strictest standards of cleanliness in its manufacturing facility. In our facility we maintain a library of product batches from which we repeatedly test to ensure that existing and past batches meet efficacy and quality standards. All products and batches have expiration dates and we guarantee 2 years shelf life after date of manufacture (not including enzymes, specifically, SOD).

With so many supplements on the market today, it’s difficult to know which to choose. Many companies offer unbeatable prices when it comes to vitamins and others make fantastic promises and claims. Labels make it clear to the consumer what product they are purchasing, but it is still unknown to them how effective or safe the product may be. The uncertainty factor in supplement shopping makes it clear that a customer should choose a brand that they can trust. We at Intensive Nutrition® understand that quality, bioavailability and manufacturing procedures make the difference in a supplement. Our products are manufactured with the biochemical pathways of the body in mind, and you can always trust our products to be the best & cost-effective.