1. Gelatin capsule shell: mainly made of animal leather. 12 had a toxic capsule incident, so be cautious when purchasing;
2. Starch capsule shell: capsule shell with plant starch as the main raw material is much safer than gelatin capsule shell, but you still need to be careful when purchasing, so as not to be deceived. It's best to choose a bigger brand.
Extended data
Manufacturing sequence
Firstly, a gelatin film is formed on a stainless steel mold. Then the gelatin film is dried and hardened to form capsules, and then taken out of the mold. Generally, there are two kinds of molds, one is to make the capsule body, and the other is to make the capsule cap with a larger diameter. However, some capsules are made of industrial gelatin, which will lead to excessive chromium.
Refer to capsule shell-Baidu Encyclopedia