I guess they do not include B1 because caffeine blocks its absorption anyway. Which is bad. It is better to have B1 in everything that involves energy instead

I guess they do not include B1 because caffeine blocks its absorption anyway. Which is bad. It is better to have B1 in everything that involves energy instead of caffeine. But B1 will hardly be noticed by the general public while caffeine is addictive for many. Energy drink producers clearly maximize for profits and not for health.