I imagine most readers of this blog would expect a group of subjects to do better on a Paleolithic diet as compared to a standard American diet, but there are few studies actually making the comparison. One was posted yesterday in the Advance-0nline-Publication section of the European Journal of Clinical Nutrition that shows subjects following a Paleolithic diet made major metabolic changes, and made them rapidly
Metabolic and physiologic improvements from consuming a paleolithic, hunter-gatherer type diet.\nFrassetto LA, Schloetter M, Mietus-Synder M, Morris RC Jr, Sebastian A.\nEur J Clin Nutr. 2009 Feb 11. [Epub ahead of print]\nPMID: 19209185 \ndoi: 10.1038/ejcn.2009.4\n
Beneficial effects of a Paleolithic diet on cardiovascular risk factors in type 2 diabetes: a randomized cross-over pilot study.
onsson T, Granfeldt Y, Ahren B, Branell UC, Palsson G, Hansson A, Soderstrom M, Lindeberg S.
Cardiovasc Diabetol. 2009 Jul 16;8(1):35. [Epub ahead of print]
PMID: 19604407
doi:10.1186/1475-2840-8-35
Floyd Chilton and colleagues wanted to examine whether theses fatty acids might have other effects, and developed a dietary intervention strategy in which 27 healthy humans were fed a controlled diet mimicking the w6/w3 ratios of early humans over 5 weeks. They then looked at the gene levels of immune signals and cytokines (protein immune messengers), that impact autoimmunity and allergy in blood cells and found that many key signaling genes that promote inflammation were markedly reduced compared to a normal diet, including a signaling gene for a protein called PI3K, a critical early step in autoimmune and allergic inflammation responses.
This study demonstrates, for the first time in humans, that large changes in gene expression are likely an important mechanism by which these omega fatty acids exert their potent clinical effects