Vitamin D3 in Morning: Mixed Evidence From PaleoHacks

Paleo Hacks has a thread about timing of Vitamin D3. Better in morning (my and several other people’s experience) or evening (Robb Wolf’s experience)?

This answer supports morning:

I prefer taking it in the morning. I think it helps set my circadian rhythm.

This answer supports night:

I prefer it at night. I find I sleep better.

This answer supports morning:

I had trouble sleeping when I started Paleo and was taking my D3 at night before bed. Was nervous and couldn’t seem to settle down. No problems since I went to morning, I have them with my fish oil right after breakfast.

By the time you read this there will probably be more evidence.

Thanks to Melissa McEwen.

5 Replies to “Vitamin D3 in Morning: Mixed Evidence From PaleoHacks”

  1. I used to take my D3 at bedtime, with the rest of my vitamins and fishoil. I was curious whether I’d notice anything with morning timing of D3, so I changed to morning supplements at first light, and as on that same day, I started yawning around 7:30 pm. I noticed because I don’t normally yawn, except that yawning is an effect I get from my bedtime melatonin supplement. So I suspect the switch to morning D3 aids in the body’s changeover to melatonin production.

    I can’t say I notice better sleep, because the dog’s been having a hard time sleeping past 5 am. But I’m sticking with morning D3 timing because it appears to trigger melatonin production with the end of daylight. I take 2000 IU D3 on top of 900 IU in multivitamin and calcium pills.

  2. I’ve always taken my D3 early in the morning. Last fall, I decided to stop eating breakfast because, much like Seth’s experience, my body was waking me up earlier and earlier, usually associated with a growling stomach. Skipping breakfast helped me sleep until 6:30 or 7:00 a.m. on the weekends, which is a significant improvement. Even without breakfast I continued to take my D3 in the morning (8K IU).
    Two weeks ago, I tried taking D3 at lunch. I slept through the night but felt as if I hadn’t slept at all when I woke up. It was the worst week of sleep that I can remember. Last week I reversed the experiment, taking D3 in the morning, and my sleep returned to being restful.

  3. I like the idea of nutrient timing especially aligning with the circadian rhythm. Vitamin D in the morning and vitamin C before bed. Anyone else experiment with this combo?

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