Hair testing is increasing in popularity, but it is still prohibitively expensive. Wholesale on a hair test is about $79 per test. Unfortunately, nothing works to fool a hair test. They can only use 1.5" (They CAN use more, but cannibinoids break down in the hair a little after 90 days, so long hair is NOT a "timeline". It's just long hair). Shaving your head also won't work, they'll just find it somewhere else (Pubic, chest, back, anywhere really) and they will also make a note that your head was recently shaved. The cannibinoids are stored WITHIN the hair folicle, so those "cleansing" shampoos are total bullshit also. Like I said, save your money,