Turkey Time! Sleep Time! Vitamin D and Tryptophan

December 02, 2025

Do you find yourself wide awake in the dark, counting down the hours til sunrise? The holidays bring joy—but also jam-packed schedules, family dynamics, money worries, and endless lists. No wonder sleep becomes impossible this time of year. If counting sheep isn't making the cut anymore and holiday stress is preventing you from relaxing, your body might be sending you a message—and the answer could be simpler than you imagine. In our chiropractic practice, we've seen firsthand that getting wellness comes from many approaches: spinal adjustments and more. Your sleep quality affects everything from your immune system to your back pain levels, which is why we're excited to share some most interesting research about two nutrition-based sleep helpers: tryptophan and vitamin D3.

VITAMIN D3: YOUR SLEEP-WAKE CYCLE'S BEST FRIEND

Vitamin D3 for bones? That's just the beginning. Think bigger! Recent research by Wu and colleagues reveals that vitamin D3 plays a crucial role in regulating your body's stress response system—particularly your hypothalamic-pituitary-adrenal (HPA) axis. When sleep gets interrupted (hello, holiday anxiety!), this system goes off the track, causing inflammation and throwing your gut health off balance. (1)  Here's the curious part: the study found that vitamin D3 supplementation helps bring back this delicate balance, helping you sleep better at night while keeping your immune system strong. It's like giving your internal clock a much-needed tune-up during the most stressful time of year!

TRYPTOPHAN: NATURE'S SLEEP SIGNAL

Everyone knows tryptophan as the culprit behind Thanksgiving food comas, but this amino acid has some seriously underrated benefits. Wong and colleagues discovered that tryptophan, especially when blended with prebiotics, works via a fascinating pathway—your gut. (2) By reducing inflammation and supporting healthy gut bacteria, tryptophan helps your body make the right sleep-promoting chemicals at the right time. Your gut literally talks to your brain about when to sleep, and tryptophan helps make sure they're speaking the same language—even when the noise of holiday stress tries to silence it.

THE BOTTOM LINE

Better sleep doesn't have to mean complicated medications. Supporting your body with vitamin D3 for hormonal balance and tryptophan for gut-brain communication can make a big difference this holiday season.

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