Every cell has a life span shorter than your entire life.

• 6 days, White blood cells <neutrophils>
• 1-9 weeks, white blood cells <lymphocytes>
• 27 days, skin
• 5 weeks, cartilage
• 3-4 months, Red blood cells <hemoglobin>
• 4 months, liver cells <hepatocytes>
• 1 year, Matured white blood cells <macrophages>
• 7 years, bones and teeth <bone-remodeling>
• ? time, tooth enamel, enamel can regenerate, controversial truth

What makes good cells and bad cells?

• diet, nutritrition and anti-nutritition
• supplments, good and bad
• circulation
• movement
• digestion