The reference list contains many retracted papers, which is problematic because the study is not based on sound science.
To check the reference lists of the papers, it is recommended to download the PubPeer browser extension. If a paper has a PubPeer comment, the extension will flag it, and you will see alerts similar to those shown in the image.
PubPeer is a platform for post-publication comments on papers, many of which raise concerns about the research integrity of the studies.
https://pubpeer.com/static/extensionshttps://pubpeer.com/