A woman named Jenny West, who lives in Chiltern Hills (west of London), commented that she “discovered independently that D3 first thing in the morning works.” I asked her for details:
I (and my family) started to take Vitamin D3 because we are all dyslexic/dyspraxic and had Seasonal Affective Disorder (SAD, a type of depression). Previously we had tried using light boxes (minimal effect), getting out every lunchtime (more useful) and finally 5HTp — which works but is expensive and if you start it once you are in SAD you can end up ‘wired’. Our SAD symptoms were mainly sleepiness and lack of energy (= hibernation), and brain fog (= difficulty concentrating).
We started taking D3 (2000 IU, Solgar) in gelcaps. That first winter, for the first time ever, no one had any seasonal affective disorder. I had had it since the age of 21, my youngest child when only 4 yrs old, and my other two children by the time they were 18 yrs old. At this point, we were taking the D3 at random times, commonly lunchtime or later, often when everyone was together and the vitamin pot was handed around!
This autumn, all the youngsters had moved out. I found I was forgetting the D3, so I moved it to the bathroom and started taking it first thing in the morning (8-9 am). Then in September, I started taking 3000 IU (instead of 2000 IU). We’d been in Greece and had come back to a gloomy autumn and I wanted to make sure SAD didn’t kick in. In a month I started sleeping through the night most nights.
Before I started taking D3 first thing in the morning, I only slept through 10% of my nights, and had been doing so for at least 15 years. I would wake at 3-4 am, but didn’t get up unless I had been awake for more than 3/4 hr. Then I would be awake until 6 am. Now I sleep without a break (other than turning over) from midnight to 8 am. I sleep like this 95% of my nights, and that includes the odd night when I took the D3 much later in the morning because I had slept in – and consequently woke the following night.
As a coeliac, I take the supplements many coeliacs take – probiotics, minerals, vitamins – but none of these affected my sleep either way. So it really looks as if it is the timing plus the correct dose of D3.
BTW the extra daytime energy is fantastic.
She is 5 feet 4 inches, 64 kg. Notice that 2000 IU first thing in the morning did not improve her sleep but 3000 IU first thing in the morning did. I had a similar experience: 2000 IU had no clear effect but 4000 IU did.