Is thiamine the same as vitamin B1?
Yes, two names for the same vitamin.
Should I take it alone or in a complex?
A complex suits most people, since the B vitamins work together.
Is B1 stored in the body?
Not to any real extent – it is water soluble, so it needs to come from food or a supplement regularly.
When should I take it?
With a meal. Earlier in the day suits people who find the B group a little stimulating.