Vitamin D deficiency - the silent energy killer
Quote from Alex D. on December 5, 2025, 11:00 amGot my bloodwork done and my vitamin D was at 18 ng/mL (should be 30-50+). Doctor said this could explain my fatigue, brain fog, and mood issues I've been dealing with for months. I work from home and barely get outside during winter so I guess its not surprising but I had no idea it could affect this much.
Anyone else discover they were deficient? How long did it take to feel better after supplementing?
Got my bloodwork done and my vitamin D was at 18 ng/mL (should be 30-50+). Doctor said this could explain my fatigue, brain fog, and mood issues I've been dealing with for months. I work from home and barely get outside during winter so I guess its not surprising but I had no idea it could affect this much.
Anyone else discover they were deficient? How long did it take to feel better after supplementing?
Quote from Jess T. on December 5, 2025, 3:30 pmMine was at 12 when I got tested. TWELVE. I was basically a zombie for months thinking I was depressed (and maybe I was, partly because of the deficiency). Doctor put me on 50,000 IU weekly for 8 weeks then switched to 5,000 IU daily maintenance.
Started feeling better around week 3-4. By week 8 it was night and day. Energy was back, brain fog lifted, even my mood improved significantly. Get retested in 3 months to make sure your levels are coming up.
Mine was at 12 when I got tested. TWELVE. I was basically a zombie for months thinking I was depressed (and maybe I was, partly because of the deficiency). Doctor put me on 50,000 IU weekly for 8 weeks then switched to 5,000 IU daily maintenance.
Started feeling better around week 3-4. By week 8 it was night and day. Energy was back, brain fog lifted, even my mood improved significantly. Get retested in 3 months to make sure your levels are coming up.
Quote from Tom B. on December 6, 2025, 8:00 amThis is SO common especially for guys who work office/remote jobs. I'd bet money half the people on this forum are deficient and don't know it. Get your levels checked people - its a simple blood test and the fix is a cheap supplement.
This is SO common especially for guys who work office/remote jobs. I'd bet money half the people on this forum are deficient and don't know it. Get your levels checked people - its a simple blood test and the fix is a cheap supplement.
Quote from Dave K. on December 6, 2025, 2:15 pmTake it with a fat source (meal, fish oil, etc) for better absorption. This made a big difference for me - my levels barely moved until I started taking D3 with my breakfast eggs instead of on an empty stomach.
Take it with a fat source (meal, fish oil, etc) for better absorption. This made a big difference for me - my levels barely moved until I started taking D3 with my breakfast eggs instead of on an empty stomach.
Quote from Marcus J. on December 7, 2025, 10:00 amAlso check magnesium while you're at it. Vitamin D needs magnesium to be properly utilized and a lot of guys are low on both. I take D3 + K2 + magnesium glycinate. The trifecta.
Also check magnesium while you're at it. Vitamin D needs magnesium to be properly utilized and a lot of guys are low on both. I take D3 + K2 + magnesium glycinate. The trifecta.