Don't expect steroid like results from it but beta alanine supplements do work. Beta alanine and carnosine are supplements used for improving muscular endurance and athletic performance.
They help restore optimal pH levels, reduce muscular fatigue, prolong muscular endurance and facilitate recovery from strenuous physical activity. Betaalanine supplements are much more effective then carnosine. The recommend dosage is 2-6 grams per day, ideally taken around workouts. Men and women will benefit from them in the exact same way and should use the same dosages.
You will get the most out of beta alanine by stacking it with creatine. Don't waste your money on some fancy overly marketed creatine that will provide no additional benefits.
Either get a bulk creatine monohydrate powder or a capsulated creatine product like ancient strength from n2bm.com.
I would take 5g of creatine and 5g of beta alanine 30 minutes before your workout.