As a chemist, I wanted to like this book so much, however, the horrible science and characterizations of women in science were awful. If I picked this up at a bookstore, I would have put it down without buying it in the first few pages. The chemist drinks out of a beaker from the lab ON PURPOSE! TWICE! Even in a cosmetic chemistry environment, this would NEVER be allowed. This book perpetrates the stereotype that women in STEM fields are nerds/dorks about everything. The female main character (Anna) sums her personality up by Lord of the Rings, Star Wars, and Muppets. This is so irritating! Anna is so clueless when it comes to determining someone's personality. She characterizes her grandma so poorly and doesn't speak nicely of many people besides her best friend who she only has known a handful of months but talks to all the time. Marco is just a knight in shining dorky armor who she manages to realize she's in love with as they fake date. Shocker. Literally, this woman has nerd as her only personality trait and thats not what scientists are! And the science is wrong! A reaction is not endo and exothermic at the same time. Comparing the two people in relationship to baking soda and vinegar and how they don't go together. The lame "I'll have H2O too" and "adenine so I can be paired with U" jokes are added like they were the top hit on a Google search for lame science jokes. Most things are described with poor science references or nerdy references. Catalina saying she will settle for the nerdy guy who is decent looking because at least he won't cheat on her?! Seriously? This book isn't even kind to male scientists.  Anna's "brilliant" makeup idea - nope, not possible. Similar things exist but they aren't based on neuroreceptors because the science is not there yet and may never be there. Additionally, making a new makeup, that contained a previously toxic substance in a bedroom? And then wearing it and making out with another biochemist while wearing it for "science"?! Heck no! That lipstick would be subject to so much testing to make sure it isn't toxic and that wouldn't be possible from a bedroom. Also, Anna is poor, but manages a lab from her bedroom?! She makes the same expensive products for cheaper in her room to give to her grandma's friends? No way! Just because you know the ingredients, does not mean you know how to make something exactly like the one you can buy on a shelf! Can you imagine this with baking? A baker tells you what's in their cake and magically you can make it so much cheaper then what its sold for? Also, for cosmetics, where ingredients come from matters so much and that can really drive up cost. As a chemist, I am furious that this book was written and essentially undermines women in science so poorly. No quality research was put into this because all chemists would be appalled from chapter 1 with drinking from lab beakers. Writing is too cheesy and lacks serious character development. 1 star, 0.5 spice (makeouts only)