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Turkey Time! Sleep Time! Vitamin D and Tryptophan

December 02, 2025

Do you lie awake through the night, eyes fixed on the clock as the hours crawl toward dawn? As the holiday season comes with its whirlwind of obligations—back-to-back events, family dinners, mounting expenses, and lists that never seem to end—restful sleep becomes increasingly hard to find. If counting sheep isn't cutting it 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 think. As chiropractors practicing chiropractic care, we know that wellness can go beyond spine care to include nutrition and exercise and more. Your sleep quality impacts everything from your immune system to your levels of back pain, which is why we're excited to share some very curious research about two nutrition-based sleep supporters: tryptophan and vitamin D3.

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

Vitamin D3 does more than build strong bones. It’s time to rethink that! Recent research by Wu and colleagues reveals that vitamin D3 plays a crucial role in maintaining your body's stress response system—specifically your hypothalamic-pituitary-adrenal (HPA) axis. When sleep gets disrupted (hello, holiday anxiety!), this system goes crazy, causing inflammation and throwing your gut health off balance. (1)  Here's the interesting 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 through the most stressful time of year!

TRYPTOPHAN: NATURE'S SLEEP SIGNAL

You've probably heard about tryptophan making you sleepy after Thanksgiving dinner, but this amino acid deserves a lot more credit. Wong and colleagues found that tryptophan, especially when combined with prebiotics, works through a fascinating pathway—your gut. (2) By reducing inflammation and boosting healthy gut bacteria, tryptophan helps your body produce 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 holiday stress is shouting over 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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