Beta Alanine vs. Carnosine

I know that Beta Alanine and L Histidine combine to make Carnosine but I was wondering if it is better to take Beta Alanine or Carnosine. Is there much of a difference? If Carnosine doesn’t make me get that ‘niacin rush’ feeling then it may be worth the slightly higher price for me. Thanks.

It is better to take beta alanine.