The objectives of this study were to evaluate the bioavailability of crystalline lutein supplements and compare lutein uptake and clearance in humans simultaneously supplemented with either vitamin C Ascorbic acid was absorbed across the mucosa of the human mounth but D-fructose had little effect and D-mannitol had no effect and the presence of D-glucose incrased the absorption of ascorBic acid
3
Probably two most useful mucosal membranes for systemic drug delivery in the oral cavity are the buccal and sublingual membranes
Fitting the buccal absorption data to a first-order equation for transport from drug in solution in the mouth transported to drug in the oral mucosa, an absorption half-life of around 0
L-ascorbic acid (ascorbate or vitamin C) is a required nutrient for humans
Omission of sodium ions from the medium decreased the absorption of ascorbic acid
4, 6-9, 11 ]
Absorption of laevo and dextro ascorbic acid in human beings can be considered as
• Monodehydroascorbate (A•-) prefers to react with radicals •
Ascorbic acid was absorbed across the mucosa of the human mounth but D-fructose had little effect and D-mannitol had no effect and the presence of D-glucose incrased the
In consequence, plasma and leucocyte concentrations of ascorbic acid increase
the buccal absorption of ascorbic acid using centrifuged - IJPRD EN English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi
Many scientists believe that at one time the human body had the ability to make vitamin C, but due to a
1972; 19:140–142
It was first tested in rabbits before being The presence of free ascorbic acid is also supported by the XRPD results, and at this concentration, the characteristic peak of ascorbic acid appears first (Figure 5), therefore the application of a 2% ascorbic acid concentration can be recommended
During the formulation of mucoadhesive films, chitosan as the polymer basis of the film was used
1
Our aim was to prepare ascorbic acid-containing chitosan films to study the properties and structures important for applicability and optimize the composition
, chitosan ascorbate had a better penetration-enhancing effect in buccal porcine mucosa as well as in Caco-2 cells [29]
Vitamin C is found in foods primarily as ascorbic acid (80-90%), but dehydroascorbic acid (10-20%) is also present
The Role of Ascorbic Acid in Iron Absorption and Iron Excretion
Ascorbic acid (vitamin C) is an unusual antioxidant in that it donates a single reducing equivalent, and the radical it forms, monodehydroascorbate, reacts preferentially with radicals instead of with non-radical compounds
It proved to be a promising polymer for the manufacture of bioadhesive films
A more recent study examined the plasma levels of ascorbic acid in 59 male smokers supplemented for two The presence of D-glucose, or 3- O -methyl-D-glucose, incrased the absorption of ascorbic acid but D-fructose had little effect and D-mannitol had no effect