3. Boost your calories. Unless your main aim is to reduce fat you need a positive caloric balance if you want to build muscle. Make sure that your daily calorie intake is 10% higher than your energy expenditure for daily maintenance and that calories are acquired from a diet characterized by a ratio of 50% carbohydrates, 40% proteins and 10% fat.

4. Get plenty of rest both in terms of adequate rest days between training sessions and sufficient sleep. Your muscles won't grow if you don't build adequate recovery time into your training program. Similarly, you can only optimize your body's levels of testosterone and growth hormone if you spend enough time sleeping.

5. Consume quality supplements to support a sound nutritious diet. For most people it should be enough to add whey protein, creatine and l-glutamine to your daily diet.

6. Don't overdo aerobic exercise. Your aim is to increase muscle mass therefore you don't want to burn excessive calories that could be utilized for bulking up.

7. Drink plenty of water. Failure to drink sufficient quantities of water will lead to dehydration and adversely affect your muscle mass. Don't forget that muscle is 70% water so a generous intake will maintain muscle volume and help growth.

No adverse side effects have been reported when used as directed but persons aged under twenty should not use growth hormone boosters without consulting a health care professional familiar with HGH therapy.