Vitamin D3 and Tiredness: What Users Say

• Mag...
• October 19, 2016

For Vitamin D Deficiency "After my wellness checkup and blood analysis, I was told by my MD to start taking Vitamin D3-2000 daily. I took it as recommended for 2 days and I noticed that I was experiencing dizziness, tiredness, and really bad cramps in my hands, feet, and legs. I thought that I was dehydrated and drank more water. The cramps kept getting worse, and I also started having increased palpitations and more dizziness. As the only change I had made in my daily regimen was taking the D3, I decided to stop taking it to see if it might be the cause. Sure enough, these symptoms disappeared. So, why are we being told to take this? Several of my friends and family have been advised to do the same lately. Is it a new 'health' sham?"

• pja...
• Taken for less than 1 month
• August 3, 2020

For Vitamin D Insufficiency "1st day fine on Vitamin D3, 2nd day horrible, day 3 no better. Side effects: shakiness, skipped heartbeats, and tired. I've tried this several times in the past few months, all with the same side effects. I'm only taking 1000 IU's. No more taking this as of today."

• phi...
• Taken for 1 to 2 years
• August 10, 2017

For Vitamin D Deficiency "D3 was prescribed as over the counter at 2k per day. I feel it would be more effective at 5k per day or more. Will check with the next blood test. Did not notice a difference. Exhaustion is a real issue with me, partly due to the need for opioids; chronic pain from a surgical accident."

• Anonymous
• Taken for 6 months to 1 year
• February 4, 2025

For Vitamin D Deficiency "I reluctantly had to go to the doctors in October last year (2024). I was suffering with exhaustion, my joints ached and they were really sore and stiff. I had this awful excessive sweating and a general feeling of feeling unwell. I was prescribed HuxD3 20,000 IU for 7 weeks. I can honestly say that I felt shocking. My legs, hands, fingers, wrists, feet, and ankles all began to swell up. Not just a little bit either, and then came this awful dizziness to the point where I couldn't even leave the house for fear of falling over. I had to nip to the local shop, which is a 10-minute walk, and it took me over 20 minutes each way because I was picking my way like an OAP. When I lifted my leg/foot to take a step, I almost went flying. My eyelids began to swell too. Due to the dizziness, I even went to A&E. I asked them if it was the meds making things worse. They denied it, but I knew it was the meds causing my problems. The only good thing about this HuxD3 was my levels went from 20-12."