ProveIt Supplements

Independent, evidence-based supplement analysis.

✓ Not Sponsored

✓ No Paid Reviews

✓ Science-Based

Company

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

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
Mega-D3

Mega-D3

Schiff

#Vitamin D
78
Safety70
Efficacy85
Transparency80
Based on Examine, Wikipedia, and 23 other sources

Overview

This product delivers a potent dose of Vitamin D3, which is highly effective for addressing deficiency and supporting bone and immune health. However, the effectiveness of the 'Red Wine Complex Blend' and Resveratrol is less clear, as their specific amounts are not fully disclosed, and the 200mg blend may not provide research-backed doses for specific benefits.

The Good

High Potency Vitamin D3: Provides a robust 5000 IU dose of Vitamin D3 (Cholecalciferol), effective for addressing deficiencies and supporting bone mineral density and immune function.

Convenient Dosing: A single softgel per day simplifies adherence to the supplementation regimen.

Synergistic Ingredients: Includes Red Wine Extract and Resveratrol for added antioxidant potential, although their specific efficacy at this dose is limited.

The Bad

Proprietary Blend: The 'Red Wine Complex Blend' (200mg) does not disclose individual amounts of Red Wine Extract or Resveratrol, making it impossible to ascertain their effective dosing.

Potential Underdosing of Resveratrol: The 200mg blend likely contains sub-therapeutic amounts of Resveratrol for significant benefits, as effective doses are typically much higher.

Contains Artificial Colors: The presence of Red 40, Titanium Dioxide, Caramel color, and Blue 1 may be a concern for consumers seeking clean labels or sensitive to artificial additives.

Is it for you?

Best For: Individuals with Vitamin D deficiency, those with limited sun exposure, people seeking bone and immune support

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

Ingredients Analysis

Vitamin D3

5000 IU

Red Wine Extract

Maltodextrin

Resveratrol

Red Wine Complex Blend

200 mg

How to Use

Take one softgel daily, preferably with a meal, or as directed by a healthcare professional.

Frequency:

Daily

Best Time:

Anytime

When:

With food for better absorption

Who Should Use This

Best For:

Individuals with Vitamin D deficiency, those with limited sun exposure, people seeking bone and immune support

Similar Products

B12 by Jamieson Natural Sources

B12

Jamieson Natural Sources

Honey Roasted Almonds by BLUE DIAMOND

Honey Roasted Almonds

BLUE DIAMOND

fairlife® CORE POWER® High Protein Milk Shake Vanilla Flavored with other natural flavors by fairlife®

fairlife® CORE POWER® High Protein Milk Shake Vanilla Flavored with other natural flavors

fairlife®

ultima REPLENISHER Lemonade Flavored with other natural flavors by ultima REPLENISHER

ultima REPLENISHER Lemonade Flavored with other natural flavors

ultima REPLENISHER

Magnetic Eyeliner & False Eyelashes Kit - Lure by KISS

Magnetic Eyeliner & False Eyelashes Kit - Lure

KISS

OLIGOVANCE by Inovance®

OLIGOVANCE

Inovance®

Recommended Articles

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 Ingredients for Healthy Weight Management

Top Ingredients for Healthy Weight Management

Dietary fiber, protein, omega-3 fatty acids, and water are crucial for managing a healthy weight.

Top Anti-Inflammatory Supplement Ingredients

Top Anti-Inflammatory Supplement Ingredients

Curcumin, omega-3 fatty acids, CBD, and Vitamin D are proven to effectively reduce chronic inflammation.

Maintain Muscle Mass with Age: Key Ingredients

Maintain Muscle Mass with Age: Key Ingredients

Adequate protein, Vitamin D, Omega-3, and the Mediterranean diet are vital for maintaining muscle mass in the elderly.