THORNE Liquid Vitamin D3 with Metered Dispenser
- Item Form: Drop
- Primary Supplement Type: Vitamin D3
- Diet Type: Vegan
- Flavor: Unflavored
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A straightforward high-potency liquid D3 from a well-established supplement brand, worth considering if a dropper format suits your routine better than capsules.
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ASIN: B0G2YVCF5QCategory: Vitamin D Supplements
Overview
Thorne's D178 is a liquid vitamin D3 supplement delivered through a metered dropper, providing 4,000 IU per dose from a 1 fl oz bottle formulated for 30 servings. It is unflavored and made without animal-derived ingredients, positioning it as a vegan option for people who prefer drops over capsules.
Liquid vitamin D appeals to anyone who has trouble swallowing pills or wants to fine tune dosage below or above a fixed capsule amount, since a metered dropper lets the dose scale with the drop count. Thorne is a brand commonly stocked by practitioners, and this formula's vegan D3 sourcing sets it apart from the more common lanolin-derived versions on the market.
- 4,000 IU vitamin D3 per dose
- Vegan formula
- Metered dropper dispenser
- 30 servings per 1 fl oz bottle
Who it's for
Suited to adults who want a flexible, swallow-free way to take a high-dose D3 supplement, including those already following a vegan or plant-based diet. Not the right fit for someone who wants a fixed, no-measuring daily capsule.
Pros and cons
- Metered dropper allows precise dose adjustment
- Vegan D3 source, no lanolin
- High 4,000 IU strength per serving
- Unflavored, easy to mix in
- 30 servings from a 1 fl oz bottle is a short supply for daily high-dose use
- No description or seller detail beyond the label
Performance notes
Each full dropper delivers 4,000 IU, several times the standard daily recommendation, so the bottle is built for people who want a therapeutic-range dose rather than a maintenance amount. Because it is unflavored, it can be added to food or a drink or taken directly.
Specifications
| Brand | THORNE |
|---|---|
| Dimensions & fit | |
| Item Dimensions | 1.2 × 1.2 × 2 inches |
| Capacity & performance | |
| Age Range Description | Adult |
| Included components | |
| Unit Count | 1 fl oz |
| Other details | |
| Item Form | Drop |
| Primary Supplement Type | Vitamin D3 |
| Diet Type | Vegan |
| Flavor | Unflavored |
| Product Benefits | Supports Immune Function And Cardiovascular Health* |
| Number Of Items | 1 |
| Specific Uses For Product | Immune Support |
Frequently asked questions
Is Thorne's D178 vitamin D3 vegan?
Yes, the listing specifies a vegan formulation, distinguishing it from D3 sourced from lanolin.
How much vitamin D does each dose provide?
A full metered dose delivers 4,000 IU.
How long does one bottle last?
The 1 fl oz bottle is formulated for 30 servings at the labeled dose.