Oh, what a shocker! In a groundbreaking display of the obvious, a study has revealed that—hold your applause—girls with central precocious puberty (CPP) are running low on vitamin D. But wait, there’s more! They’ve split these vitamin D-deficient damsels into two groups: the “hurry-up-and-grow” squad (RP-CPP) and the “take-your-sweet-time” team (SP-CPP). And after much poking and prodding, they’ve found that—drumroll, please—both groups are equally sun-starved. Who would’ve thought?

With a whopping sample size of 340 girls, a mere 10 were living the vitamin D dream (≥ 30 ng/mL). The rest? Not so much. But don’t worry, the researchers didn’t stop there. They checked out everything from hormone tests to bone density, because why not? Turns out, if you’re a girl growing up too fast, it’s not your vitamin D levels you should blame, but perhaps your BMI, IGF-1, or that pesky LH/FSH ratio.

And in a twist that no one saw coming (except maybe everyone), the time of year you get your blood drawn actually matters. Yes, the season—something about the Earth’s tilt and the sun’s hide and seek habits—has a strong correlation with those elusive vitamin D levels. So, if you’re looking for a scapegoat for your vitamin D woes, blame Mother Nature and her seasonal mood swings.

In summary, girls with CPP are not getting their fair share of vitamin D, but hey, it’s not making their condition any worse. And if you’re trying to figure out why some girls hit puberty faster than a cheetah on a treadmill, look elsewhere. Maybe check their gym membership or their growth hormone stash, but leave poor vitamin D out of this.