Vitamin D3 in Morning: Moving D3 & Fish Oil from Evening to Morning Improves Sleep (Story 22)

A few weeks ago I got an email from a reader named Alexander Vinther:

I take Vitamin D3 (2000 units) in the morning (between 7 and 9 am) together with fish oil. My sleep is deeper and I don’t wake up at odd times during the night. I tried increasing my intake 3-fold [= to 6000 IU] but felt too energetic/restless when going to bed (regardless of the time). I stopped taking Vitamin D3 (the regular dose) for a while to check my results only to start waking up in the night (or waking up early).  Before this, my intake of D3 and fish oil was usually in the evening (everybody seems to recommend taking vitamins in the evening). The change from evening to morning was with both fish oil and D3 (I have always been taking them simultaneously) with huge improvement in sleep.

This is especially interesting because he made the evening-to-morning change long before I blogged about it. I asked for details.

Tell me about yourself.

Male, 24 years old. I live in Denmark and study philosophy. I exercise a lot (6 times a week, crossfit).

What were your sleep and energy like before you started taking D3 and fish oil in the morning?

My energy levels during the day would change a lot, sometimes with a huge surge in energy in the evening making falling asleep difficult. This would lead to few hours of sleep or a general feeling of not having slept at all (this in comparison to what I feel now, the feeling of “deep” sleep). [This is what happened when he was taking D3 and fish oil in the evening. –Seth]

Have you tried other D3 dosages?

I started out with 1400 units of Vitamin D3. I now take a multivitamin which has a small amount of D3, hence the 2000 units. I didn’t notice a difference between 1400 and 2000 units, but 6000 made me giddy/restless for the first week, which is for as long as I tried that particular dosage. 4000 units seems to have the same effect as 2000 units, but it is a dosage I haven’t taken for more than a week.

How long have you been taking Vitamin D3 in the morning?

I switched the time (from evening to morning) of my D3 intake about a year ago. Stumbling upon your blog confirmed my belief in or underlined the evidence for a difference in morning/evening intake.

How soon after you started D3 and fish oil in the morning (instead of the evening) did you notice better sleep?

I would say I see improvements in my sleep 3-4 days after D3 intake

What brands of Vitamin D3 and fish oil do you use?

My D3 brand is Danish: Naturdrogeriet D Mega. My fish oil brand is Biosym EPA-GLA+. I take 2 capsules containing a total of 1200 mg fish oil (DHA, EPA, GLA), 600 mg Borago oil and 700 mg soyalecithin.

4 Replies to “Vitamin D3 in Morning: Moving D3 & Fish Oil from Evening to Morning Improves Sleep (Story 22)”

  1. This is all so interesting. When I read about the vitamin D on your blog this fall, I went out and got me a bottle from the local supermarket (in Sweden). What caught my eye then was that I hoped it would help with my around 3 pm slump, which was so bad I basically could not work beyond it. OK, maybe I could, but it would be hard concentrating, and I would need a nap, and by that time I needed to go home anyway…

    I started taking 1 in the morning, with my cup of sugar water, and fish oil capsules that I use for the SLD (which has gotten me down from slightly overweight, to normal weight, and my waist is now roughly where I expect it to be). And, I do think it improved the afternoon slump rather quickly.

    But, nothing for the night. I never had sleeping problems earlier (except during pregnancy). It took 3 kids for me to become sleep-deprived. But, I have been having a hard time sleeping, and also of waking up multiple times.

    I upped the intake to 4 tablets – but that just hurt my stomach. I have eased back – between 2 and 3. And, there may be an improvement. Not back to where I used to be, but fewer waking up in the night. But, not as noticeable as the lesser afternoon slump (or finding my waist).

  2. I 38 tried 2000 D3 and 4000 for 2 months with my regular multivitamins and did not notice anything different.

    Seth: Thanks for reporting your experience.

  3. I began taking mega doses of Barleans fish oil in the morning a few weeks after increasing the D3 to 5000. I’ve never fell asleep so fast and deep as I have now. I’m 38, bipolar and am off ambien and benedryl just recently. I do take a small amount of melatonin. The only problem is I sleep at least 9 hours a night and am quite slow in the mornings. It’d take this anyday over the chronic insomnia.

    Thanks for the article Seth and the sharing Ase.

    Seth: Thanks for reporting your experience. Your immune system is probably working much better now than when you had chronic insomnia.

  4. First and foremost; Seth, I thank you for sharing.

    May of last year til August of last year, I was on 4000IU D3 and 1000mg/q12hr. I was ok but still sluggish and work at night and sometimes with an OT. Since I am diabetic II and loosing weight it isn’t working on my favor.

    October of last year, I was tweaking with OTC med for a month. I increased my D3 to 10,000 (q12hrs) and Lovaza 2gm(q12hrs) and Multivitamins with D 400IU as well as cooking mushrooms as meat substitute. this one works for me quite well my energy is back 200%. Being said, I have lost almost 20lbs in two months.

    Addendum: My Dr is well aware of my OTC and Rx meds.

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