Vitamin D Deficiency

Back in October 2020, I had a long overdue blood test. I think it was actually supposed to be the test that told us whether I’d absorbed and responded properly to the iron infusion I’d had in June 2019 but with starting the Masters and then the pandemic, it had only just become possible.

Going out and going to the Doctors’ Surgery did cause me a lot of anxiety – I’m still struggling with going out and with feeling very vulnerable when I’m out – but the appointment felt very safe and very efficient. I was probably in and out in less than ten minutes. About a week later, we got the results back and my iron was within the normal range. So all good there. However, my Vitamin D levels were seriously low, so low that they wanted to take immediate action. I was prescribed Colecalciferol, a prescription Vitamin D supplement, and instructed to take one a day for ten weeks.

It wasn’t surprising to hear that my vitamin D was low. It’s not uncommon for autistic individuals to have low vitamin D levels and with the pandemic and lockdown, I was staying inside a lot more and therefore not getting as much sunlight as usual, let alone the sunlight I needed. So I wasn’t shocked. I was pretty wary about taking supplements though: my last attempt with supplements had rendered the anti-depressants I was taking at the time completely ineffective, leaving me in a deep, dark hole of depression. Even though I stopped taking the supplements immediately, the anti-depressants never worked again. So I was concerned that something similar might happen again and I’d lose the only consistent (and I use that word loosely) anti-depressant I had in my toolbox. But my doctor explained just how important it was to get my vitamin D up and despite my anxiety, I committed to taking them.


For the first three weeks, I didn’t feel any different. My sleep was as sporadic as ever and I was constantly tired, something that is very much linked with my anti-depressant medication but is also a symptom of a vitamin D deficiency. Week four passed and I still didn’t feel any change but my Mum felt that there had been a slight shift, in my day to day behaviour and my engagement in whatever I was doing. She couldn’t quantify or qualify it any more than that but she did have a feeling that something was slightly different. I was reluctant to believe her, not feeling it myself.

Weeks five and six were tough: I was constantly exhausted and incredibly depressed, although it wasn’t always noticeable, covered up by anxiety-induced busyness. I was sleeping a lot but I was still tired but by the end of that sixth week, I was starting to wonder if I felt different. It’s just so freaking difficult to tell when the change you’re watching out for is so gradual. I wasn’t sure, just cautiously optimistic.

I’d been instructed to go back to the doctors’ surgery for another blood test between four and six weeks to see how I was responding to the supplement. It was closer to six weeks given some difficulty getting an appointment but when it finally happened, it was quick and efficient, just like the first appointment.

During what was the seventh week of this period, I was still tired and sleepy but again, I was starting to think that it wasn’t quite as bad as it had been. It wasn’t drastically better but I did feel a slight – intangible, I guess – difference. But week eight gave me a real sign that things were changing. I was still fatigued easily, still had days where I was really sleepy but I suddenly noticed that I wasn’t needing to drink as much Red Bull as I had been. Ever since I started this round of anti-depressants, I’ve been relying on Red Bull to keep me awake during the day and when the vitamin D first showed up as  problem, I was probably drinking three a day – more when I was commuting to university (and yes, I’m aware that this isn’t healthy and have a plan with my psychiatrist to address it, although that has been derailed somewhat by the pandemic). But during week eight, I realised that I was getting through the day on one, sometimes less. Still not super healthy, yes, but a really good step in the right direction. And if I wasn’t feeling like I needed them as much to stay awake, then I had to assume that my energy levels were improving, to some degree at least.

When the blood test results came back, they showed that my vitamin D levels were back within the normal range but still pretty low so my doctor wrote me a new prescription for the rest of the winter with potential for extending it throughout the duration of the pandemic. I’m grateful for that; it’s one worry off my mind at least.


My energy levels still aren’t great. But getting my vitamin D levels under control was never going to be ‘the fix.’ Fatigue is a constant in my life, between my anti-depressants, Chronic Fatigue Syndrome, and other health (physical and mental) problems. But that doesn’t mean I can’t improve my situation. Getting my vitamin D levels back up has helped, hopefully hydrotherapy will help, perhaps the next anti-depressant won’t have such bad side effects (whenever I have time to try a new one – mid-Masters isn’t exactly the perfect time, especially having just reached the modules I’ve been most excited for). Sometimes I need to rage and cry about the pretty constant tiredness, but most of the time I can look forward and focus on the next thing that could help.

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