It will increase carnosine in the body, more if you exercise than are just sedentary, but beta alanine is concentrated in places like the olfactory bulb so will increase your sense of smell amongst other things, but its still not what I'm referring to.

Side note: If the aim is to increase carnosine in the body, I'd do carnosine as its better absorbed than beta alanine according to some studies, and then there's the remyelinating effect of histidine on the nervous system amongst other things, which is beneficial for some types of mental acuity, useful if you want to be a stand up comedian or some other verbally quick witted individual.

and the tea?

The paresthesia you refer to when taking beta alanine is much less intense than the paresthesia experienced if doing 500mgs of nicotinic acid. Side note. If anyone drops 500mg of nicotinic acid, the skin flushing effect and inflammation which can be likened to the sunburn effect, will be seen most where the skin is exposed to UV light because it rebinds the frayed strands of DNA in cells.

Its not what I'm referring to though.