Gut microbial composition depends on different dietary habits just as health depends on microbial metabolism, but the association of microbiota with different diets in human populations has not yet been shown.
Significant differences were found in gut microbiota between European children (EU) and that of children from a rural African village of Burkina Faso, , where the diet is high in fiber content, and is similar to that of early human settlements at the time of the birth of agriculture.
Burkina Faso children showed a significant enrichment in Bacteroidetes and depletion in Firmicutes, and a unique abundance of bacteria from the genus Prevotella and Xylanibacter, completely lacking in the EU children. Enterobacteriaceae (Shigella and Escherichia) were significantly underrepresented in Burkina Faso children.
In addition, we found significantly more short-chain fatty acids in Burkina Faso children.
Gut microbiota might have coevolved with the polysaccharide-rich diet, allowing to maximize energy intake from fibers while also protecting from inflammations and noninfectious colonic diseases.
Water is an essential nutrient - it is required in amounts that exceed the body's ability to produce it. All biochemical reactions occur in water. It fills the spaces in and between cells and helps form structures of large molecules such as protein and glycogen.
Most foods contain water. The body can usually get 20% of its total water requirements from solid foods alone. The human body can last weeks without food, but only days without water.
The digestion process also produces water as a byproduct and can provide around 10 per cent of the body’s water requirements.
Water is a transparent and nearly colorless chemical substance. Its chemical formula is H2O, meaning that its molecule contains one oxygen and two hydrogen atoms.
Water covers 71% of the Earth's surface. It is vital for all known forms of life. On Earth, 97% of the planet's crust water is found in seas and oceans, 1.7% in groundwater, 1.7% in glaciers and the ice caps. Only 2.5% of this water is freshwater, and 98.8% of that water is in ice (excepting ice in clouds) and groundwater. Less than 0.3% of all freshwater is in rivers, lakes.
Safe drinking water is essential to humans and other lifeforms even though it provides no calories or organic nutrients. ~One billion people still lack access to safe water. It was estimated that by 2025 more than half of the world population will be facing water-based vulnerability, and by 2030 water demand in some developing regions of the world will exceed supply by 50%.
Approximately 70% of the freshwater used by humans goes to agriculture.