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Vitamin D3: Optimal Levels vs Toxicity
Posted: Tue Jan 27, 2026 2:30 am
by TropicStrength
I'm at 85 ng/mL. Is there any benefit to going higher, or do I risk hypercalcemia?
Re: Vitamin D3: Optimal Levels vs Toxicity
Posted: Tue Jan 27, 2026 3:15 am
by AndeanLifter
85 is the sweet spot. Anything over 100 doesn't show much extra benefit and could be problematic.
Re: Vitamin D3: Optimal Levels vs Toxicity
Posted: Tue Jan 27, 2026 4:00 am
by MedellinMuscle
Are you taking Vitamin K2 with it? K2 is vital for directing that calcium into bones and away from arteries.
Re: Vitamin D3: Optimal Levels vs Toxicity
Posted: Tue Jan 27, 2026 4:50 am
by CaliFlex
I take 10,000 IU and I'm only at 50 ng/mL. Some people are just poor absorbers.
Re: Vitamin D3: Optimal Levels vs Toxicity
Posted: Tue Jan 27, 2026 5:35 am
by LatinoBulk
Take it with your fattiest meal. Vitamin D is fat-soluble. No fat = no absorption.
Re: Vitamin D3: Optimal Levels vs Toxicity
Posted: Tue Jan 27, 2026 6:20 am
by TropicStrength
I use the oil-based drops. Seems to work much better than the dry tablets.
Re: Vitamin D3: Optimal Levels vs Toxicity
Posted: Tue Jan 27, 2026 7:05 am
by AndeanLifter
Magnesium is also required for the activation of Vitamin D in the liver and kidneys.
Re: Vitamin D3: Optimal Levels vs Toxicity
Posted: Tue Jan 27, 2026 7:40 am
by MedellinMuscle
Low magnesium = ineffective Vitamin D. It's a whole cascade.
Re: Vitamin D3: Optimal Levels vs Toxicity
Posted: Tue Jan 27, 2026 8:20 am
by CaliFlex
I'll add Magnesium Glycinate to my stack then.
Re: Vitamin D3: Optimal Levels vs Toxicity
Posted: Tue Jan 27, 2026 8:55 am
by TropicStrength
Good call. Most lifters are deficient in Mag anyway.