An alternative to testing is to use a low test dose for a period of time and watch for mild side effects. (vin.com)
Most researchers suggest going for 2 - 5 grams a day, though some studies have tested doses as high as 20 - 22 grams a day with positive results. (gymjunkies.com)
However, even this small test dose has caused reactions in some animals. (2ndchance.info)