Hello, first of all, let me give you some general knowledge. The main functions of velvet antler are: strengthening yang, invigorating qi and replenishing essence, which means strengthening yang and replenishing essence in plain English. Maca is mainly anti-fatigue and has little nourishing effect. To put it bluntly, its effect is not as good as leek. So, if you want to improve the sexual intercourse time, then you can choose to use velvet antler. However, there are three levels of efficacy of velvet antler. The first level, we call it "Jiuzhen velvet". Jiuzhen velvet antler is the best variety of velvet antler. If you want to strengthen yang and tonify kidney, then you can choose Jiuzhen velvet. If you don't know Jiu Zhen Rong, you can make up your knowledge online. In addition, second-class goods are what we call "third-class velvet". This grade of pilose antler is generally dry pilose antler without a piece. This kind of velvet antler is suitable for anti-fatigue. In terms of nourishing, it is far less rapid than Jiuzhen velvet. The third-class product, that is, the "air-dried velvet antler" that we often see in Chinese medicine shops, has little efficacy after being stored for a long time.