Effects Of Various Dietary Components On Chromium Absorption And Excretion

Apparently, a number of dietary components affect the absorption of chromium. Effects of simple versus complex dietary carbohydrate on urinary chromium excretion were investigated [40]. Thirty-seven healthy men and women volunteered for the 18-week study in which they ate breakfast and dinner in the research kitchen facility at the Beltsville Human Nutrition Research Center. Lunches and weekend meals also were provided "to go". The reference diet was designed by nutritionists to meet known nutrient needs. This reference diet consumed for 12 weeks contained 35% of total kilocalories as complex carbohydrate and 15% of kilocalories as simple sugars. A "simple sugar diet" with ~35% of kilocalories as simple sugar and 15% of kilocalories as complex carbohydrate was fed for 6 weeks. The chromium content of the reference diet contained 16.0 ± 1.2 |xg Cr/1000 kcal and of the simple sugar diet was 15.7 ± 0.8 |g Cr/1000 kcal. Urinary chromium excretion was significantly higher during the simple sugar diet period than after consuming the reference diet. Furthermore, 27 of the subjects increased urinary chromium excretion in the simple sugar period while 10 subjects excreted more chromium with the reference diet. There was no gender difference in response. Overall, the proportion of dietary carbohydrate consumed as simple sugars seemed to lead to increased urinary chromium losses [40].

Ascorbic acid seems to enhance chromium absorption in rats and in human beings. In rats dosed concurrently with 51CrCl3 and ascorbate, total urinary 51Cr was increased without decreasing 51Cr in the tissues suggesting greater absorption of 51Cr [41]. Offenbacher and colleagues gave three women 1 mg Cr3+ with or without 100 mg ascorbic acid on different days. For each woman, plasma chromium was higher when chromium was consumed with ascorbic acid than when consumed without ascorbic acid [42].

High levels of phytate impaired chromium absorption in rats [43], but lower levels did not seem to be detrimental [44, 45]. The question of effects of dietary fiber on chromium absorption needs further investigation. The one elderly subject in severely negative chromium balance in the study conducted by Bunker and colleagues [31] consumed a high fiber diet.

Was this article helpful?

0 0
Diabetes 2

Diabetes 2

Diabetes is a disease that affects the way your body uses food. Normally, your body converts sugars, starches and other foods into a form of sugar called glucose. Your body uses glucose for fuel. The cells receive the glucose through the bloodstream. They then use insulin a hormone made by the pancreas to absorb the glucose, convert it into energy, and either use it or store it for later use. Learn more...

Get My Free Ebook

Post a comment