Phd nutrition beta alanine is ideal for using either post workout or pre workoutr beta alanine is the only naturally occurring beta amino acid taken by many athletes and often used in conjunction with l histidine to help improve physically performancer phd beta alanine can be taken throughout the day however it may be beneficial to use before intense exerciser the phd beta alanine 500mg supplements come in convenient capsules and is to be taken with waterr beta alanine helps to raise muscl