It works perfectly - just a warning that it takes about 5-7 days to really feel the effects (with the best effects coming on at about the 3 week and beyond). I found that the product works wonders with only 2 sprays twice per day (morning and evening) on a 12 week cycle (1-2 weeks off after this to allow your body to rebound and rest a little) - but your mileage may vary. ;o) Personally, I do very intense weight training 3 times per week (Chest/Biceps, Back/Triceps, Legs/Shoulders - combined with cardio) and this has helped immensely in gaining strength in both concentric and eccentric lifts, over muscle growth (hypertrophy), and fast loss (works wonders for this). It also has many other good effects like increased vitality, increased skin elasticity and "glow", increased mental concentration, increased sex drive, etc. etc. - all the things we associate with "Youth".