Healthspan are OK - qood quality, good service, reasonable prices (although some mainstream products will be cheaper at the supermarket).
Whether herbal/vitamin/complementary products work is a different question. Some have a good evidence base (although rarely from randomisd controlled trials) others are 'snake oil' and 'smoke and mirrors'.
Omega 3 seems to have some reasonable evidence, glucosamine is a little less certain - but at the suggested doses neither will do any harm.
Gingko is the one I take - it seems to have a statistically significant (just) benefit in warding off Alzheimer's for certain groups of people - and again it does no harm except to the wallet.