Chemistry & the Quirky Science Behind Valentine’s Day

Posted on February 14, 2024

Ah, Valentine’s Day – the day when love is in the air, and Cupid is busy sharpening his arrows. But have you ever wondered about the scientific shenanigans behind this heart-filled day? Because we, the charismatic scientists at CARO, sure have!  So, we decided to ask Chat GPT to fill us in on all the chemistry, biology, and physics that make up Valentine’s Day (as one does in this day and age!) Needless to say, we got some interesting information that we had to share that proves V-Day is more than just a box of chocolates and bouquet of roses (however these are always welcome!)

The Chemistry of Love

Valentine's DayLet’s start with the love potion, shall we? No, we’re not talking about some mystical concoction brewed by an evil stepmother in a fairytale. We’re talking about the brain’s own love chemistry, fueled by neurotransmitters and hormones.

According to Chat GPT, Dopamine, the neurotransmitter responsible for pleasure and rewards, goes haywire when you’re smitten. Meanwhile, serotonin keeps you in a good mood, and oxytocin, the ‘cuddle hormone,’ enhances the feeling of attachment. So even though you may feel like you’re under a spell on Valentine’s Day, you can thank your brain’s own chemical reactions!

The Art of Attraction – Pheromones

Ever caught a whiff of someone and felt a certain way? Blame it on pheromones! While the impact of human pheromones is still a topic of debate, there’s no denying that a captivating scent can be a powerful attraction in the name of love – cue the roses!

So, when you’re out choosing a perfume, cologne, or the perfect bouquet this Valentine’s Day, remember it’s not just about smelling good, it’s about unleashing the power of science on those around you.

Did Somone say Flowers?Valentine's Day

Have you ever wondered why we associate roses with love? It’s not just because they’re pretty – there’s a whole Victorian era language of flowers called floriography. In this floral code, different flowers conveyed different sentiments. Red roses symbolize love and passion, while yellow roses represent friendship. So, the next time you receive a bouquet (which will hopefully be on Valentine’s Day), consider it a carefully crafted love letter from Mother Nature herself.

The Language of Love

Receiving a Valentine’s Day card has been a long-standing tradition throughout time. From middle-school notes, and meaningful love letters from your partner to silly quotes from your friends. When composing or reading these letters, the brain’s reward centers light up, releasing a flood of feel-good neurotransmitters like dopamine, oxytocin, and serotonin.

CARO wanted to share the love and the feel-good neurotransmitters this Valentine’s Day, with our February Cooler Insert.  If you’ve placed a bottle order recently you’ve most likely received a little card with a punny icebreaker inside; feel free to share these cards with family friends and colleagues by downloading them using the links below (Click the photo to get the download).

On the outside Valentine’s Day may seem like a concoction of chocolates, flowers, and more sweets, but peel back the rose petals and you’ll find the science behind it all – cheers to the science of love!


Yours in Science,
Team CARO.

Valentine's Day

Valentine's Day



ChatGPT: the science of Valentine’s Day

Floriography: The Secret Language of Flowers in the Victorian Era — Planterra Conservatory (


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