Estimation of the diet-dependent net acid load in 229 worldwide historically studied hunter-gatherer societies  

Oleh:

Strohle, Alexander ; Hahn, Andreas ; Sebastian, Anthony

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: The American Journal of Clinical Nutrition vol. 91 no. 02 (Feb. 2010), page 406-412.
Topik: HEALTH AND NUTRITION

Ketersediaan

Perpustakaan FK Nomor Panggil: A07.K.2010.01 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Background: Nutrition scientists are showing growing interest in the diet patterns of preagricultural (hunter-gatherer) humans. Retrojected preagricultural diets are reportedly predominantly net base producing in contrast to the net acid-producing modern Western diets. Objective: We examined the dietary net acid load [net endogenous acid production (NEAP)] for 229 worldwide historically studied hunter-gatherer societies to determine how differences in plant-to-animal (P:A) dietary subsistence patterns and differences in the percentage of body fat in prey animals affect the NEAP. Design: With the use of 1) ethnographic data of dietary P:A ratios of hunter-gatherer populations, 2) established computational methods, and 3) knowledge that fat densities of animal foods consumed by hunter-gatherers varied between 3% and 20%, we computed the NEAP for the diets of 229 populations in 4 different models of animal fat densities (model A, 3%; model B, 10%; model C, 15%; model D, 20%). Results: As P:A ratios decreased from 85:15 to 5:95, the NEAP increased from –178 to +181 mEq/d (model A) and from –185 to +120 mEq/d (models B and C). Approximately 50% of the diets consumed by the 229 worldwide hunter-gatherer populations were net acid producing (models B and C). In model D, 40% of the diets were net acid producing. Conclusions: Our data confirm that the NEAP of hunter-gatherer diets becomes progressively more positive as P:A ratios decline. The high reliance on animal-based foods of a worldwide sample of historically studied hunter-gatherer populations renders their diets net acid producing in 40–60% of subgroups of P:A ratios. Only further investigations can show the implications of these findings in determining the NEAP of human ancestral diets.

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