Mini-Fasting Guide
Current Post:

Do You Take Vitamin D? Then I Have a Question for You!

Vitamin D / Vitamin D benefits

When I can’t find the answer to a question in the medical literature, I turn to first-hand experts. And today, that’s all of you who take supplemental vitamin D… so can I pick your brains?

← Return to Immunity page Related Resources:


I know that being slim is at the top of your wish list, and it’s a big deal for me…

One of the first things I tell my patients is to eliminate dairy foods from their diets. And I won’t…

No doubt about it—summer can be cruel to your skin. You’re probably defending yourself already, with floppy hats and sunscreen.…

Is someone you love suffering from Alzheimer’s disease? If so, you know how devastating this tragic disease is—not only for…

Remember the last time you had hours to relax, read a novel, go for a swim, get your nails done,…

Every time I walk into a gym, I’m always shocked to see just how crowded the treadmills and ellipticals are.…

I’m all about being healthy, but hey… I also believe in living it up a little! So if you run…

When you stagger out of bed in the morning, does that first cup of coffee bring you back to life?…

When it comes to organs, your heart gets all the love. Heck, we even exchange heart-shaped cards on Valentine’s Day.…

Do You Take Vitamin D? Then I Have a Question for You!

Written by Dr. Kellyann Petrucci

My friends call me a “medical nerd.” I spend hours with my nose stuck in medical journals and books, keeping up with the latest research.

Sometimes, however, the answers I’m looking for can’t be found in the pages of a book or journal. And this is one of those times—so I’m turning to you to help me “crowd-source” the answer.

Here’s the back story.  I frequently prescribe supplemental vitamin D3 for my patients, and I believe that everyone should get their vitamin D levels checked. It’s critical to get enough of this nutrient because it plays so many roles in health. For instance, vitamin D benefits include:

·        It helps protect against anxiety and depression.

·        It may lower your risk of breast cancer.

·        It reduces your risk of certain autoimmune diseases, such as multiple sclerosis.

·        It builds strong bones.

·        It helps keep your thyroid healthy.

·        It can help prevent cavities.

·        It may help prevent Alzheimer’s disease.

·        It protects against diabetes.

·        It can fight obesity.

These days, more and more people are deficient in vitamin D because they’re “sun-phobic” (thanks to over-alarmist doctors), and they’re also spending more time indoors in front of computers. As a result, those of us in the field of clinical nutrition are prescribing a lot more vitamin D than we used to.

And all this brings me to my call for help.

Recently, a friend of mine who’s taking vitamin D to correct a deficiency asked me, “What’s the best time of day to take it?” She’d read on some sites that you shouldn’t take it late in the day, because it can alter your melatonin levels and make it hard for you to sleep. On other sites, however, people said that a night-time dose of vitamin D helped them snooze more soundly. Since my friend has trouble with insomnia, she wants to make sure she’s doing the right thing.

I’m scouring the medical literature to see if there’s any formal research on this question, but so far I’m coming up dry. So I’m calling on my real-life experts: you all!

I’d love to hear about your experiences if you’re taking supplemental vitamin D. Do you take it in the morning or in the evening? And if you’ve taken it around bedtime, did it seem to make you sleep more soundly or toss and turn?

I’m looking forward to seeing your answers. Thank you for helping me out… and for helping my friend get a good night’s sleep!

Looking for a reputable Vitamin D supplement? Try Dr. Kellyann’s very own SLIM Sunshine!



Keep Thinking Big & Living Bold!




Click here to subscribe