D3 25 mcg (1000 IU)®

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.

Serving Size: 1 Tablet(s) · 1 per day

Not Present

• 

  21st Century Vitamin D3

  21st-century-vitamins4.8(4000)

  $9.49
• 

  21st Century 1000 Iu Softgels

  OTC Superstore4.8(97)

  $9.19
• 

  21st Century D3 Tablets

  21st-century-vitamins4.2(14)

  $6.99
• 

  21st Century Chewable Vitamin D3

  iHerb4.8(728)

  $4.99
• 

  Vit D3 1000 IU 1000 Unit Cap 250 By 21st Century Nutritional Prod/

  AmericanPharmaWholesale.com4.8(350)

  $6.86
• 

  21st Century Vitamin D-3 25mcg 1000iu Softgels 250ct

  eBay - bluemedical4.8(350)

  $14.57
• 

  21st Century D 1000 Iu Extra Strength Tablets

  Walmart - Pharma Frills

  $22.22
• 

  21st Century Tablets D-1000

  Pasteur Pharmacy4.8(4000)

  $10.99

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

• Cooper Complete Nutritional Supplements from Cooper Aerobics

  Vitamin & supplements store

  12330 Preston Rd, Dallas, TX 75230

  Directions(888) 393-2221

• Vitamin D: evidence-based health benefits and recommendations for population guidelines

  WB Grant, SJ Wimalawansa, P Pludowski, RZ Cheng - Nutrients, 2025 - mdpi.com

  … IU/day (50 mcg/day) of vitamin D 3 , which prevent diseases and deaths. Furthermore, a daily dose between 4000 and 6000 IU of vitamin D 3 to achieve serum 25(… , such as 1000 IU/kg …

  2025177 citations

• Use of vitamin D in clinical practice

  JJ Cannell, BW Hollis - Alternative medicine review, 2008 - researchgate.net

  … in otherwise healthy patients with 2,000-7,000 IU vitamin D3 … diet and supplements of approximately 1,000 IU (25 mcg) per … may require up to 10,000 IU per day to achieve a 25(OH)D …

  2008485 citations

• Targeted 25-hydroxyvitamin D concentration measurements and vitamin D3 supplementation can have important patient and public health benefits

  WB Grant, F Al Anouti, M Moukayed - European journal of clinical …, 2020 - nature.com

  … in those with baseline 25(OH)D concentrations ≥25 nmol/L (adjusted odds ratio 0.75, 0.60–0.95; P for interaction = 0.006)” [6]. Thus, supplementing with 1000–2000 IU/day of vitamin D …

  2020109 citations

• Benefits and requirements of vitamin D for optimal health: a review

  WB Grant, MF Holick - Altern Med Rev, 2005 - anaturalhealingcenter.com

  … 1,000 IU, 40 percent of the body should be exposed to 25 … Vitamin D and health in the 21st century: bone and beyond. … the vitamin D3 adequate intake versus 100 mcg (4000 IU) per …

  2005895 citations

• The miraculous results of extremely high doses of the sunshine hormone vitamin D3

  A OVER - 2011 - media.portmoni.com

  … I take with each 10,000 IU’s of D3 contains 1000 mcg of K1 (… Anyway, if you mention any of this to a normal medical doctor, … Vitamin D3 was on the lower side, maybe less than 1000 IU a …

  20114 citations

• Safety issues of vitamin D supplementation

  A Zittermann, S Prokop, JF Gummert… - Anti-Cancer Agents in …, 2013 - ingentaconnect.com

  … in apparently healthy free-living individuals a daily amount of up to 250 µg (10,000 IU) is safe. … (OH)D of up to 4 nmol/l per microgram oral vitamin D3 can be observed. At high doses, eg …

  201389 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2019-09-24. DSLD Label ID: 207485. 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.