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Rx Vitamins

Rx D3 Forte

Rx D3 Forte

A high-concentration liquid cholecalciferol (vitamin D3) formulation blended in MCT oil, delivering 5 times the potency per drop compared to standard Rx D3.
  • Size:   2 fl. oz. (60 ml)
  • Manufacturer:   Rx Vitamins
  • SKU:   RX-D3FORTE
  • Stock status:   0
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Rx D3 Forte is a palatable liquid source of pure cholecalciferol (vitamin D3) blended with MCT oil. It is formulated at a higher concentration than the standard Rx D3, providing 5 times the potency per drop. This higher-concentration formula is intended for animals that would benefit from a greater amount of vitamin D3 per serving, including larger animals or those with greater vitamin D3 needs. The product comes with a glass graduated dropper to facilitate accurate serving size.

Cholecalciferol supports normal calcium and phosphorus absorption, helps maintain healthy bone mineralization, and promotes normal immune system function.

Product name

Rx D3 Forte

Short summary

Rx D3 Forte provides a palatable source of pure cholecalciferol blended with MCT oil at a higher concentration than standard Rx D3 — 5 times the potency per drop. This formulation is suited for individuals with greater vitamin D3 needs or where a smaller administration volume is preferred. A glass graduated dropper is included to support accurate dosing.

What It Is

Rx D3 Forte is a liquid veterinary formulation containing pure cholecalciferol — the natural form of vitamin D3 — blended with MCT oil. It is supplied in a 2 fl. oz. (60 ml) bottle with a glass graduated dropper. The formula provides 5 times the cholecalciferol concentration per drop compared to standard Rx D3.

How It Works

Cholecalciferol is the precursor form of vitamin D3 used by all animals. Once absorbed, it supports normal calcium and phosphorus metabolism, helps maintain healthy bone mineralization, and promotes normal immune system function.

When To Use It

Rx D3 Forte is intended for animals with greater vitamin D3 needs, larger body size, or where a higher-concentration formula provides a more practical administration volume. Use as directed by a veterinarian; consult a veterinarian before use if the animal is on any medications.

Practitioner Note

Rx D3 Forte delivers cholecalciferol at 5 times the concentration per drop compared to standard Rx D3, making it suitable for larger animals or those requiring a higher daily vitamin D3 intake. Dose carefully using the glass graduated dropper provided; vitamin D3 is fat-soluble and accumulates in tissue. Monitor vitamin D3 status as clinically appropriate.

Clinical Highlights

  • Cholecalciferol (Vitamin D3): The natural form of vitamin D3; supports normal calcium and phosphorus absorption and helps maintain healthy bone mineralization.
  • MCT Oil Carrier: Medium-chain triglyceride oil used as the delivery base; provides a palatable, liquid format for easy administration.
  • High-Concentration Formula: Provides 5 times the cholecalciferol potency per drop compared to standard Rx D3, allowing a smaller administration volume.
  • Glass Graduated Dropper: Included to support accurate, consistent dosing.
Supplement Facts
Serving size: see label for species-specific dosing
Amount Per Serving%DV
Cholecalciferol (Vitamin D3)see label*
* Daily value not established for veterinary use
Other ingredients: MCT oil

Cholecalciferol — the natural form of vitamin D3; supports normal calcium and phosphorus absorption and helps maintain healthy bone mineralization.

Vitamin D3 testing with VDILab.com is recommended to establish a safe and effective dosage.