Too much of a lot of things is bad for you.
The articles on the Springtime page are from peer reviewed journals.
I did my research and do annual blood panels
This was a thread I started last year. A lot of discussion on research and personal experience. I should be doing blood panels again in late April/early May
My no chem garlic preventive journey
Anecdotally, I was very impressed. I live in tick central. For reference we trained in a teammates wooded area. His dog has a scalibor collar. He pulls off 4-5 ticks a day. My dog had a thorough tick check that night, then for 2 days after. No ticks. He did pick up a few along the summer. Four total. Last summer was a bad tick year, FWIW.
The main issue I saw was soft stools, so I am backing up this year.
Obvoiusly it is a tough but a lot of things are tough choices. I am not convinced these flea and tick chemicals are safe for our dogs either.