From July 19, there is a significant drop in the SERP position for many keywords

[Guest]

There are no errors in the search console.

The website is basically a blog about health topics, there are no affiliates, and I am not selling anything.

Does anybody experience a similar issue?

[Hemin]

Doesn’t google require you to be a medical professional in order not to punish your website when you’re in the health niche?

[Joel]

Since you did no changes then it may be your competitors optimized their pages and have begun outranking your content

[Princess]

Doesn’t google require you to be a medical professional in order not to punish your website when you’re in the health niche?

You're right. I'm not sure about getting a manual penalty, but you'll find it really hard to outrank other sites with better authority.