The Natural Calm is awesome! I started taking it a couple of weeks ago. I noticed the difference very fast. I tried the magnesium oil a few years ago and it can burn when put on the skin straight. I put some on my son's (in his 20's)psoriesis (spelling??) and it was agony. Many things can can cause lack of desire. Hormone imbalance, stress, underlying anger, unresolved traumas and poor health (poor nutrition) can cause a lack of desire.