Why does B2 turn my urine bright yellow?
Riboflavin is naturally fluorescent yellow, and what you do not absorb is passed out. Entirely harmless, and not a sign the rest is being wasted.
Should I take a complex or single B vitamins?
A complex for most people, since the Bs work together. B12 is the usual exception, taken separately at a higher dose on a plant-based diet or with age.
When is the best time to take them?
Morning, with food. Some people find B vitamins keep them awake if taken late in the day.
What is the difference between folate and folic acid?
Folic acid is the synthetic form; folate is what occurs in food, and supplements often use methylfolate. Both are used - the pack says which.