Due to Taurine and Beta-alanine sharing the same transporter, a taurine deficiency can be experimentally induced by beta-alanine overfeeding, and this relative taurine deficiency may be coupled with some risks such as more susceptability to Alcohol-induced liver fat buildup[126] (something taurine normally protects against).[127] The aforementioned liver study used a fairly small dose of beta-alanine for rats (3% drinking water) but coupled it with a moderately large alcohol intake (36% of caloric intake)[126] although this dose of beta-alanine has also been noted to induce cardiac effects in mice including remodelling[123] and lipid peroxidation.[128]
In animals, this 3% intake of beta-alanine in water may reduce circulating taurine levels by 50%[129] to 77%[123] and may reduce cardiac levels of taurine by 16.6-22.7%.[128]
http://examine.com/supplements/Beta-Alanine/#summary9-1
So I was thinking that high dosage of taurine may deplete beta-alanine on the other hand.
And beta-alanine is the rate limiting enzyme of carnosine production, which "the internet" talks about if it is some kind of magical molecule for health. Not sure, didn't really research it.