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Eating fewer calories improves the ability of stem cells to repair and renew the body in various tissues.

Paneth cells and intestinal stem cells work together metabolically for stem cell function and regeneration.

Krt15+ cells in the mouse intestine resist radiation and can start tumors.

Stem cells regenerate tissues and their behavior varies by environment, suggesting the hematopoietic system model may need revision.

Different types of stem cells exist within individual skin layers, and they can adapt to damage, transplantation, or tumor growth. These cells are regulated by their environment and genetic factors. Tumor growth is driven by expanding, genetically altered cells, not long-lived mutant stem cells. There's evidence of cancer stem cells in skin tumors. Other cells, bacteria, and genetic factors help maintain balance and contribute to disease progression. A method for growing mini organs from single cells has been developed.