Suggested use: Take a single pack daily for 21 straight days. On training days, take it 30-45 minutes before lifting. On non-training days, take it prior to bed. For best results, "cycle" this product following a schedule of three weeks on and one week off. Best results if used by those who are 25 years or older. However, due to its ability to help modulate free test levels, it could benefit others as well. Consider "stacking" Animal Stak with either Animal Test or Animal M-Stak for even greater gains. For more stacking information, go to www.animalpak.com.