8 R. C. Grandison et al., “Amino-acid imbalance explains extension of lifespan by dietary restriction in Drosophila.” Nature 462, no. 7276 (December 2009): 1061–64.

9 B. P. Yu et al., “Nutritional influences on aging of Fischer 344 rats: I. Physical, metabolic, and longevity characteristics.” Journal of Gerontology 40, no. 6 (November 1985): 657–70.

10 S. Leto et al., “Dietary protein, life-span, and biochemical variables in female mice.” Journal of Gerontology 31, no. 2 (March 1976): 144–48.

11 M. Ross et al., “Food preference and length of life.” Science 190, no. 4210 (October 1975): 165–67.

12 J. P. Richie et al., “Methionine restriction increases blood glutathione and longevity in F344 rats.” FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology 8, no. 15 (December 1994): 1302–7.

13 M. López-Torres et al., “Lowered methionine ingestion as responsible for the decrease in rodent mitochondrial oxidative stress in protein and dietary restriction possible implications for humans.” Biochimica et biophysica acta 1780, no. 11 (November 2008): 1337–47.

14 D. Fau et al., “Effects of ingestion of high protein or excess methionine diets by rats for two years.” Journal of Nutrition 118, no. 1 (January 1988): 128–33.

15 S. M. Solon-Biet et al., “The ratio of macronutrients, not caloric intake, dictates cardiometabolic health, aging, and longevity in ad libitum-fed mice.” Cell Metabolism 19, no. 3 (March 2014): 418–30.

16 E. Parrella et al., “Protein restriction cycles reduce IGF-1 and phosphorylated Tau, and improve behavioral performance in an Alzheimer’s disease mouse model.” Aging Cell 12, no. 2 (April 2013): 257–68.

17 A. Pan et al., “Red meat consumption and mortality: results from 2 prospective cohort studies.” Archives of Internal Medicine 172, no. 7 (April 2012): 555–63.