What percentage of collagen do we lose each year after the age of 20?

After the age of 20, our bodies experience a gradual decline in collagen production, which is a crucial protein for maintaining skin elasticity and overall structural integrity in various tissues, including bones and cartilage. Research indicates that this reduction is approximately 1% per year. This loss contributes to visible signs of aging such as wrinkles, sagging skin, and joint issues over time.

The other percentages stated in the options may seem plausible but do not align with the widely accepted understanding of collagen loss. For instance, a 5%, 7%, or 10% annual decline would suggest a much more accelerated aging process than what studies have typically documented. This fundamental knowledge about collagen dynamics is important not only for understanding aging but also for developing skincare and health strategies that can mitigate these effects.