1 Collagen is most commonly found within the body in the skin, bones and connective tissues. 2  The word collagen is derived from the Greek kolla, meaning glue. 3  Collagen gives the skin its strength and structure, and also plays a role in the replacement of dead skin cells. Collagen is most commonly found within the body in the skin, bones and connective tissues. 2  The word collagen is derived from the Greek kolla, meaning glue. 3  Collagen gives the skin its strength and structure, and also plays a role in the replacement of dead skin cells.
Healing time depends on the severity of the strain. Mild muscle strains usually heal within two weeks. Moderate muscle strains may take six to eight weeks to heal. Prevention of Recurring Back Strain. Many people who experience recurring back pain have weak core muscles - the muscles that support the back.
Health related question in topics Conditions Illness .We found some answers as below for this question How long does achilles tendonitis take to heal,you can compare them. Even in mild cases, it can take weeks to months of rest for achilles tendonitis to repair itself. Be patient & let it rest often. [ Source: http://www.chacha.com/question/how-long-does-achilles-tendonitis-take-to-heal ] More Answers to How long does achilles tendonitis take to heal.