Absorption of oral vitamin C is 5-15%. Lipo is 100%. Hence, around 6 would probably be enough, not more then 8.

BTW, if C gets absorbed, it still doesn't mean it will enter the cell, insulin resistance for instance may be in effect. Lipo doesn't need receptors.

That is also an incredible amount of money to spend! I myself can not afford that. VC capsules ( 1,000 mg) are relatively inexpensive and especially inexpensive for those with higher BT's.

Intakes of 1 to 1.5 grams results in 50% absorption, but at intakes over 12 grams only 16% of the vitamin is absorbed. In contrast, an intake of less than 20 mg, has a 98% absorption rate. Since most of people here take tea spoon which is between 3 and 4 grams, absorption is around 30% or so. This is tested in healthy people, with GI stress this drops down. With aging you have to consider helicobacter and other stuff.



There are some papers:

http://onlinelibrary.wiley.com/doi/10.1 ... 9/abstract
A two-compartment disposition model of ascorbic acid (AA) pharmacokinetics with saturable and time-constrained intestinal absorption was developed. The model was fitted to pharmacokinetic data obtained after oral administration to nine healthy volunteers of two effervescent dosage forms differing in AA content: Celaskon 60 mg (CK60) and Celaskon 500 mg (CK500). It was demonstrated that in the case of CK500 less than 30% of the dose was absorbed as compared with CK60.

In Vitamin C pharmacokinetics in healthy volunteers: evidence for a recommended dietary allowance. they say that 1.25g is between 30% - 50%.


OK, its definitely not 5%, but its far from 50% either. It looks like Cathart was right with 20%.