"Drank the 'pregnancy drink' from Starbucks and eight hours later gave birth at 39 weeks and four days," said one new mom over a video of herself sipping out of one of those coveted huge water jugs in a hospital bed.

The trend has been spreading like wildfire because, well, the third trimester is rough and many moms-to-be want it to end as soon as possible (and meet their new babies, of course). The app is filled with videos from people filming themselves ordering and drinking the tea, usually with commentary along the lines of, "Please let this work."

One such mom, Coty Kenneth, filmed her video trying the "Starbucks Labor Drink" when she was 38 weeks pregnant with her second child.

"Supposedly you drink one and it puts you into labor," she said. "I don't believe it...but I'll try anything."

The recipe for the tea varies slightly, but it starts with Passion Tango tea and lemonade. Most people add a pineapple base and four pumps of pure cane sugar syrup, some add four pumps of raspberry syrup instead.

As is the case with many wellness trends on TikTok, the "Starbucks Labor Tea" is mostly a repackaging of common natural tricks. For instance, red raspberry leaf tea has long been considered -- anecdotally, that is -- to be helpful in preparing the body for labor.

But as Dr. Jamie McManus, a family physician and chair of medical affairs at the wellness company Shaklee tells Glamour, even if that benefit were clinically proven, you're unlikely to get much from the TikTok version.

"This 'labor tea' is based upon using raspberry leaf tea during the last trimester of pregnancy to help women have a shorter labor with less needed medical interventions, including C-sections," she says. "But, as with essentially all herbs, there are limited clinical studies, and lots of conflicting studies, evaluating their safety or efficacy in pregnancy or breastfeeding. And the kicker is, there isn't actually any raspberry leaf in this drink but rather four pumps of raspberry syrup -- which means 80 calories of sugar."