Alpha 7 pheromones are unscented and have an immediate effect. Only 1 drop of them is enough to get results. The product contains 6mg androstenone and 1 mg androsterone. Most people can't smell these pheromones but due to their high concentration, it is still possible that some people would be able to smell them. These fragrance-free pheromones have a characteristic musky pheromone odor that is not completely different from the human body odor. That's why we recommend using Alpha 7 with another fragrance of your choice.