I don't write reviews. I'm writing this one because I researched cat supplements for two weeks before buying, and I want to save someone else the time.

Here's what I found out:

Cats can't synthesize taurine — they have to get 100% of it from their food. Commercial cat food adds taurine, but the manufacturing process destroys a significant percentage of it. AAFCO literally requires double the taurine in canned food because they know retort sterilization wipes out half. The "complete and balanced" label is measured against a minimum threshold, not optimal levels.

I also found out most taurine supplements are powders, and cats reject them because they change the taste of food. So even if you're "supplementing," the cat might be eating less of the food (and less of the supplement) — net negative.

Liquid drops solve both problems. My cat doesn't notice it. She eats normally. The dose actually gets consumed.

I docked one star because the bottle is small and I'd prefer a 60-day supply option for the price. But the product itself does what it says. My cat's coat is noticeably better after 5 weeks. Her energy is up. I'll keep buying it.

One warning: I bought my first bottle from a third-party Amazon listing and it didn't work the same. The official site (felinevitals.com) is the only place to get the real product. Lesson learned.