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Ann Nutr Metab. 2011;59(2-4):117-26. doi: 10.1159/000331572. Epub 2011 Dec 2.

Diet-dependent net endogenous acid load of vegan diets in relation to food groups and bone health-related nutrients: results from the German Vegan Study.

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  • 1Nutrition Physiology and Human Nutrition Unit, Institute of Food Science and Human Nutrition, Leibniz University of Hannover, Hannover, Germany. stroehle@nutrition.uni-hannover.de

Abstract

BACKGROUND/AIMS:

Dietary composition has been shown to affect acid-base homeostasis and bone health in humans. We investigated the potential renal acid load (PRAL) and the estimated diet-dependent net acid load (net endogenous acid production, NEAP) in adult vegans and evaluated the relationships between NEAP, food groups and intake of bone health-related nutrients.

METHODS:

The German Vegan Study (GVS) is a cross-sectional study. Data from healthy men (n = 67) and women (n = 87), aged 21-75 years, who fulfilled the study criteria (vegan diet for ≥1 year prior to study start; age ≥18 years, and no pregnancy/childbirth during the last 12 months) were included in the analysis. NEAP values were calculated from diet composition using two models: one based on the protein/potassium quotient and another taking into account an anthropometry-based loss of urinary organic anions.

RESULTS:

Mean daily intakes of phosphorus, potassium, sodium, magnesium and vitamin C were above, and vitamin D and calcium below Dietary Reference Intake (DRI). Regardless of the model used, the diet in the GVS was characterized by a nearly neutral NEAP. A strong correlation was observed between the NEAP values of the two models (r(s) = 0.873, p < 0.001). Only the consumption of fruits decreased constantly across the increasing quartiles of NEAP.

CONCLUSIONS:

It can be hypothesized that vegan diets do not affect acid-base homeostasis. With respect to bone health, the significance of this finding needs further investigation.

Copyright © 2011 S. Karger AG, Basel.

PMID:
22142775
[PubMed - indexed for MEDLINE]
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