D3 400 IU (10 mcg)

Suggested Use

Directions: Adults - Take one softgel daily; preferably with food; as a dietary supplement.

• 

  Mason Natural Vitamin IU Softgels

  Target4.7(69)

  $9.75
• 

  Mason Natural D3 Softgels

  Walmart - Nutrients Best, a Mason Natural Certified Vendor4.8(20)

  $14.57
• 

  Mason Vitamin D3 10 mcg (400 IU)

  Instacart4.7(69)

  $3.79
• 

  Mason Natural Vitamin D3 10 mcg (400 IU) 100 Softgels

  GoSupps.com4.7(69)

  $29.99
• 

  Mason Natural D 400IU Vanilla Chewables

  Pasteur Pharmacy4.0(2)

  $4.49
• 

  Mason Natural 250 Mcg Softgels

  CVS Pharmacy4.8(50)

  $4.99
• 

  (3 pack) Mason Natural Vitamin D3 - Strengthens Bones and Muscles, 60 Softgels

  Walmart - Nutrients Best, a Mason Natural Certified Vendor4.8(61)

  $23.69
• 

  Mason Natural Calcium 500 with Vitamin D3

  Mason Natural4.6(59)

  $7.99

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

• The Vitamin Shoppe

  4.6 (154)

  Vitamin & supplements store

  1803 Rockville Pike, Rockville, MD 20852

  Directions(301) 231-7900

• GNC

  2.9 (30)

  Vitamin & supplements store

  13733 Connecticut Ave, Wheaton-Glenmont, MD 20906

  Directions(240) 283-6811

• The Vitamin Shoppe

  4.4 (142)

  Vitamin & supplements store

  300 N Frederick Ave, Gaithersburg, MD 20877

  Directions(301) 527-1282

• The Vitamin Shoppe

  4.4 (72)

  Vitamin & supplements store

  10 University Blvd W, Silver Spring, MD 20901

  Directions(301) 593-0595

• The Vitamin Shoppe

  4.4 (104)

  Vitamin & supplements store

  2460 Market St NE #701, Washington, DC 20018

  Directions(202) 269-0809

• The Vitamin Shoppe

  4.2 (86)

  Vitamin & supplements store

  6250 Columbia Crossing Cir Ste L, Columbia, MD 21045

  Directions(410) 872-0440

• Vitamin D—function and uses

  D Vitamin, P Mason - Pharmaceutical Journal (Vol 277), 2006 - easy-immune-health.com

  … micrograms? It should be noted that 1 … dose of 1,000mg daily with vitamin D 400 IU did not significantly reduce hip … The Department of Health recommends a paediatric supplement …

  2006

• Vitamin D: The Challenge of Bridging the Gap and the Rationale for Supplementation

  P Mason, N Aslam, G Jenkins - Food Nutr. J, 2023 - hsis.org

  … of the vitamin D gap and its impacts on health and disease. … sunshine and supplements, explaining why supplements are … bone health range for adults under 70 years vary from 10 mcg (…

  20232 citations

• Clinical Implications and Preventive Strategies for Neonatal and Infant Hypovitaminosis D: Analysis and Comparison of Current Evidence

  V Ferrari, G Biasucci, E Candela, R Ortolano, F Baronio… - Endocrines, 2025 - mdpi.com

  … levels above 40 ng/mL for better health outcomes [9,10]. … intake of 1000 to 1600 IU (25 to 40 mcg/day). Similarly, other … administering 400 IU/day of vitamin D to infants born to vitamin D-…

  20252 citations

• The pleiomorphic actions of vitamin D and its importance for children

  SY Kim - Annals of pediatric endocrinology & metabolism, 2013 - synapse.koreamed.org

  … understanding of vitamin D for child and adolescent health. … daily 10 microgram vitamin D supplement for those at risk of … should be supplemented with 400 IU/d of vitamin D. In United …

  201356 citations

• The Role of Vitamin D in Hormonal Balance

  P Bose - nooria-swiss.com

  … their vitamin D3 levels and consult with Complete Healthcare for … The NHS says a daily 10 mcg/μg (400 IU) vitamin D supplement … not taking more than 100 mcg/μg (4,000 IU) per day. …

• Evaluating the Impact of Vitamin D Supplementation on Serum Leptin Levels: A Meta-Analysis of Randomized Controlled Trials

  B Nikooyeh, ME Motlagh, T Neyestani - Nutrition and food in health …, 2024 - nfsr.sbmu.ac.ir

  … (supplement/fortification) or frequency at which vitamin D is taken. … Vitamin D3 (cholecalciferol) 400 IU/ml (10 mcg/ml) plus thin … of daily vitamin D ranged from 400 IU (13) to 4000 IU (18). …

  2024

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2025-08-22. DSLD Label ID: 336413. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.