I already take it regularly -- nice side effect!
From the London Daily Mail:
Could a popular arthritis supplement be the key to a longer life? Glucosamine could extend life 'by 8 years'
A food supplement made from crab shells could hold the key to a long life, according to scientists.
Tests on mice found glucosamine extended lifespan by almost 10 per cent - equivalent to an extra eight years in human terms.
It is thought the sugar-like supplement, which has long been used to keep joints healthy and ease the pain of arthritis, extends life by altering the metabolism.
I get an adverse reaction to the marine derived glucosamine but there is a vegetarian variety available and that works fine.