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mardi 28 octobre 2014

Inorganic nitrates, exercise, hypertension and kidney function

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http://ajcn.nutrition.org/content/90/1/1.long
FIGURE 1
FIGURE 1
A schematic diagram of the physiologic disposition of nitrate, nitrite, and nitric oxide from exogenous (dietary) and endogenous sources. The action of bacterial nitrate reductases on the tongue and mammalian enzymes that have nitrate reductase activity in tissues are noted by the number 1. Bacterial nitrate reductases are noted by the number 2. Mammalian enzymes with nitrite reductase activity are noted by the number 3.



TABLE 4
Mean nitrate and nitrite contents of a convenience sample of juices
JuicesNitrateNitrite
mg/L; ppmmg/L; ppm
Acai0.560.013
Carrot27.550.036
Cranberry9.120.145
Green tea0.230.007
Pomegranate12.930.069
Vegetable juice126.170.092
  • 1 V8; Campbell Soup Co (Camden, NJ).

Food sources of nitrates and nitrites: the physiologic context for potential health benefits


TABLE 5
Mean nitrate and nitrite contents of a convenience sample of fruit, vegetables, meats, and processed meats1
NitratesNitrites
mg/100 gmg/100 g
Fruit
 Apple sauce0.30.008
 Banana4.50.009
 Fruit mix0.90.08
 Orange0.80.02
Vegetables
 Broccoli39.50.07
 Carrots0.10.006
 Cole slaw55.90.07
 French fries2.00.17
 Ketchup0.100.13
 Mustard greens116.00.003
 Salad mix82.10.13
 Spinach7410.02
 Tomato39.20.03
 Vegetable soup20.90.001
 Desiccated vegetable dietary supplement227,89010.5
Meats/processed meats
 Bacon5.50.38
 Bacon, nitrite-free3.00.68
 Ham0.900.89
 Hot dog9.00.05
 Pork tenderloin3.30
  • 1 Nitrate and nitrite concentrations were quantified by ion chromatography (ENO 20 Analyzer; Eicom, Kyoto, Japan). Analysis of foods reflects the mean value from triplicate or quadruplicate analyses.
  • 2 Nature's Way Garden Veggies (1 capsule; 900 mg desiccated vegetables; Nature's Way Products Inc, Springville, UT).










Medicine & Science in Sports & Exercise:
doi: 10.1249/MSS.0000000000000548
Original Investigation: PDF Only

Nitrate Supplementation, Exercise, and Kidney Function: Are There Detrimental Effects?.

Carpentier, Alain; Stragier, Séverine; Bréjeon, Camille; Poortmans, Jacques R



FIGURE 2
FIGURE 2
Forest plot of randomized clinical trials investigating the effects of beetroot juice and inorganic nitrate supplementation on SBP. A random model was applied to obtain the pooled mean differences in SBP. Data for SBP are presented as mean differences and 95% CI. Two trials were reported in the same manuscript (33). BP, blood pressure; SBP, systolic blood pressure.




http://www.nutritionj.com/content/11/1/106

http://journals.cambridge.org/download.php?file=%2FBJN%2FBJN108_11%2FS0007114512000190a.pdf&code=58b3b66d9f2fe2418eb4aa14d4bda045

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