ProveIt Supplements

Independent, evidence-based supplement analysis.

✓ Not Sponsored

✓ No Paid Reviews

✓ Science-Based

Company

  • About Us
  • Our Methodology
  • Contact
  • Blog
  • Authors
  • Partners

Legal

  • Privacy Policy
  • Terms of Service
  • Medical Disclaimer
  • Affiliate Disclosure

Resources

  • All Categories
  • Ingredient Database
  • Browse Supplements
  • FAQ

© 2026 ProveIt Supplements. All rights reserved.

Medical Disclaimer: The information provided is for educational purposes only and is not intended as medical advice. Always consult with a qualified healthcare professional before starting any supplement regimen.

Prove It
Browse SupplementsBlogAuthorsAboutMethodologyFAQ
Get Your Personalized Supplement StackSupplement Stack Quiz
Menu
HomeBrowse SupplementsBlogAuthorsAboutMethodologyFAQ
Vitamin D3 1000 IU

Vitamin D3 1000 IU

Rexall

#Vitamin D
83
Safety85
Efficacy80
Transparency80
Based on Examine, Wikipedia, and 23 other sources

Overview

Rexall Vitamin D3 1000 IU provides a solid dose of Vitamin D3 to support bone health, immune function, and overall well-being. The 1000 IU dose effectively addresses deficiency in at-risk individuals. Regular intake helps maintain optimal vitamin D levels, especially beneficial for those with limited sun exposure or dietary restrictions. This product is a straightforward and effective way to supplement Vitamin D intake.

The Good

Supports bone health by aiding calcium absorption

Boosts immune system function

Helps regulate mood and reduce risk of depression

The Bad

Potential for hypercalcemia with excessive doses

May interact with certain medications (discuss with healthcare provider)

Individual responses can vary, some may not experience noticeable benefits

Is it for you?

Best For: Individuals with Vitamin D deficiency, those with limited sun exposure, support for bone health

Skip If: You have hypercalcemia or kidney disease without consulting a doctor

Ingredients Analysis

Vitamin D

1000 IU

How to Use

Take one softgel daily, preferably with a meal.

Frequency:

Daily

Best Time:

Anytime

When:

With food

Who Should Use This

Best For:

Individuals with Vitamin D deficiency, those with limited sun exposure, support for bone health

Recommended Articles

Herbal Boosters & COVID-19 Antivirals: Safe Mix?

Herbal Boosters & COVID-19 Antivirals: Safe Mix?

Herbal supplements may interact with COVID-19 antivirals, requiring careful consideration and further research.

2025's Top Vegan Protein Powders: A Buyer's Guide

2025's Top Vegan Protein Powders: A Buyer's Guide

In 2025, the best vegan protein powders are third-party tested, ensuring purity, safety, and high nutritional content.

Immune Supplements & Pregnancy Safety 2025

Immune Supplements & Pregnancy Safety 2025

The safety of immune-boosting supplements during pregnancy in 2025 hinges on supplement type, dosage, and health conditions.

Top Immune Support Ingredients: What Works?

Top Immune Support Ingredients: What Works?

Vitamin D, zinc, and echinacea are key ingredients in immune support supplements, backed by scientific evidence.