Do I Need a Rabbi to Verify a Supplement's Kosher Status?

https://varimail.com/articles/how-to-confidently-choose-kosher-supplements-without-calling-the-rabbi-every-time/

7 Practical Questions About Kosher Supplements That People Actually Want Answered If you're buying vitamins, protein powder, herbal extracts, or any other supplement, it's normal to wonder whether you need a rabbi to verify kosher status