PLoS One. 2014 Apr 9;9(4):e93611. doi: 10.1371/journal.pone.0093611. eCollection 2014.
Douard V1, Patel C1, Lee J1, Tharabenjasin P1, Williams E2, Fritton JC3, Sabbagh Y4, Ferraris RP1.
Excessive fructose consumption inhibits adaptive increases in intestinal Ca2+ transport in lactating and weanling rats with increased Ca2+ requirements by preventing the increase in serum levels of 1,25(OH)2D3. Here we tested the hypothesis that chronic fructose intake decreases 1,25(OH)2D3 levels independent of increases in Ca2+ requirements.
Adult mice fed for five wk a high glucose-low Ca2+ diet displayed expected compensatory increases in intestinal and renal Ca2+ transporter expression and activity, in renal CYP27B1 (coding for 1α-hydroxylase) expression as well as in serum 1,25(OH)2D3 levels, compared with mice fed isocaloric glucose- or fructose-normal Ca2+ diets.
Replacing glucose with fructose prevented these increases in Ca2+ transporter, CYP27B1, and 1,25(OH)2D3 levels induced by a low Ca2+ diet. In adult mice fed for three mo a normal Ca2+ diet, renal expression of CYP27B1 and of CYP24A1 (24-hydroxylase) decreased and increased, respectively, when the carbohydrate source was fructose instead of glucose or starch. Intestinal and renal Ca2+ transporter activity and expression did not vary with dietary carbohydrate. To determine the time course of fructose effects, a high fructose or glucose diet with normal Ca2+ levels was fed to adult rats for three mo. Serum levels of 1,25(OH)2D3 decreased and of FGF23 increased significantly over time.
Renal expression of CYP27B1 and serum levels of 1,25(OH)2D3 still decreased in fructose- compared to those in glucose-fed rats after three mo. Serum parathyroid hormone, Ca2+ and phosphate levels were normal and independent of dietary sugar as well as time of feeding.
Thus, chronically high fructose intakes can decrease serum levels of 1,25(OH)2D3 in adult rodents experiencing no Ca2+ stress and fed sufficient levels of dietary Ca2+. This finding is highly significant because fructose constitutes a substantial portion of the average diet of Americans already deficient in vitamin D.
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- CYP24A1 429 hits as of Jan 2016
- CYP27B1 606 hits as of Jan 2016
- HFCS or fructose decreases Calcium and vitamin D if have CKD – Feb 2010
- Cola Soft Drinks reduce Calcium and vitamin D
- Many reasons for vitamin D deficiency Cola, and perhaps HFCS is one of them
- National Estimates of Dietary Fructose Intake Increased from 1977 ... file, not web page
- Fructose altered hundreds of brain genes (in rats) unless also take Omega-3 – April 2016
- Too much fructose reduced both serum and active vitamin D in rats – April 2013
- Fructose (High Fructose Corn Syrup) consumes 2X more Magnesium than sugar – May 2014
- More colas (fructose, caffeine, phosphoric acid), lower vitamin D – July 2014
- High fructose corn syrup can't disguise itself as 'corn sugar,' FDA decides Natural News June 2012
- http://janeshealthykitchen.com/hidden-dangers-fructose/ has a chart of increasing use of fructose
Note: monosaccharide = free fructose; disaccharide =sucrose