BP changes in chimpanzees fed a salt-supplemented diet. Twenty-two chimpanzees were fed infant formula either alone (n = 12) or with added salt (n = 10) as follows: 5 g/d for 19 weeks, 10 g/d for 3 weeks, and 15 g/d for 67 weeks. A 20-week period without added dietary salt concluded the experiment. The BP changes were significantly increased over base line (*P < 0.05, **P < 0.01, ***P < 0.001) and significantly different between groups (⁺P < 0.05; ⁺⁺⁺P < 0.001). Reproduced with permission from Nature Medicine (48).