“For each human cell in your body there are 10 microbial cells, most of them living in the gut and helping us digest things we can’t digest on our own,”

The immune system is a complex and dynamic network of cells, membranes and organs.

Bowel habits can vary widely from person to person, but most doctors agree that anyone who passes hard stools and does so less than three times per week is constipated.

Despite the appeal of supplements, we should not rely heavily on them to meet our needs.

Energy cannot be created or destroyed, it merely changes its state. This is what happens when we eat. The food we eat becomes glucose, which is used as fuel to make energy.