This book follows Ruth who moves back in with her parents after a breakup, after her dad is diagnosed with Alzheimer's. It's definitely my type of book - contemporary, main character in her late 20s, quirky humor, etc etc... and I liked it. However, something just felt lacking. I think... it could have been longer? There were moments when I wanted more detail - like about Joel (the ex), about her brother, about how they were feeling. Basically having those side characters more fleshed out.

I did really like the diary-style, especially towards the end. I did find Ruth's relationship with her dad heartwarming, too. I especially loved the diary entries from her dad from when Ruth was growing up.

Even though this book didn't become an absolute favorite of mine, I'd still really recommend it because I feel like the humor and style would really work for a lot of readers. Goodbye, Vitamin is a quick, witty but still sweet book.