Nutrition adaptation
Nutrition - fats, carbohydrates, proteins, minerals vitamins - provides energy structure function to the body. Different ecosystems provide different nutrition and The people adjust itself to it. Required 800 600 kilo calories per day.
- High metabolic rate in in in better diet Nations
- Frequent famines create tolerance among people thrifty genotype. Nielsen.
- lactose intolerance. Difficulty in digesting milk. 80% American Indians are lactose intolerant. Michael de vrese 2001. 75% world is lactose intolerant.
- Small body size.
- light skin helps absorb solar radiation and produce vitamin D which is required for calcium.
Cultural
- Pig feast in African tribes to adjust protein diet. Dani tribe.
- Fishing hunting gathering horticulture maintaining livestock.
- combine plants and animal food supplement proteins minerals.
- Agriculture to grow food
- !Kung - meat - and bantus - cereals - fulfill their needs by barter system. RB Lee
- Kota and todas same. Herskovitz. Culture to bring nutritional diversity.
- poor people in India who cannot afford pulses eat beef.
McDade 2019 - poverty and nutrition induces genetic changes.
Displacement. Deforestation exploitation has created malnourished tribals like Baiga sahariya. Xaxa.