Amino acids are typically absorbed into the bloodstream within 30-60 minutes. However, they can remain in your system for up to 4-5 hours. This means that you don't need to take them every day to experience their benefits. Instead, you can take them on an as-needed basis. For example, if you're looking to boost your workout performance, you can take an amino acid supplement before your workout. If you're looking to improve your recovery, you can take an amino acid supplement after your workout.