What Are the Normal Vitamin D Levels by Age? - Verywell Health
Jan 14, 2025 · According to the National Institutes of Health Office of Dietary Supplements, the average recommended daily intake of vitamin D for most adults, children, and teens is 600 IU, …
Normal vitamin D levels by age, sources, and toxicity
Apr 25, 2025 · Generally adequate vitamin D levels in the blood are 20 ng/ml or above for adults. People aged 1 to 70 years should aim to get at least 15 mcg or 600 IU of vitamin D per day.
Vitamin D Optimal Levels: Why They Matter and How to Maintain …
Aug 15, 2025 · Vitamin D is essential for bone, immune, muscle, and emotional health, and may lower the risk of chronic diseases. Aim for 40–60 ng/mL (100–150 nmol/L) to support optimal …
Vitamin D: What's the "right" level? - Harvard Health
Apr 16, 2020 · To sum up, they estimated that a vitamin D level of 20 ng/mL or higher was adequate for good bone health, and subsequently a level below 20 was considered a vitamin …
Vitamin D in the blood - 25-hydroxy vitamin D - Normal ranges
Oct 10, 2024 · In the International System of Units (SI), vitamin D [25 (OH)D] in the blood is measured in nmol/L. The normal vitamin D level in the blood in the SI is: Why normal levels …
Vitamin D numbers: what they really mean | Quest Diagnostics
Vitamin D levels of 30 to 100 ng/mL are considered optimal. Vitamin D levels between 20 and 29 ng/mL are considered suboptimal. Vitamin D insufficiency may lead to elevated parathyroid …
Appendix A Table 1, Serum Vitamin D Level Reference Ranges - Vitamin D …
Experts disagree about the terms that should be used to describe these ranges, whether these ranges adequately reflect the evidence, and whether these ranges reflect clinical thresholds …
Understanding Vitamin D Levels
Feb 17, 2025 · With so many people unknowingly suffering from a vitamin D deficiency, understanding what normal vitamin D levels are and how to maintain them is essential for a …
Vitamin D Test: Normal Range, Benefits, and Why It Matters?
Jul 1, 2025 · Vitamin D is like a hug from the sun. Nonetheless, too little or too much vitamin D can cause health problems. That’s why doctors use a blood test to check your vitamin D …
Vitamin D Levels Normal: Optimal Range And Benefits
Calculate your Vitamin D deficiency risk with our free tool. Learn optimal Vitamin D levels, health benefits, and how to maintain normal range.