Amber NaturalZ Vibactra Immune Support Herbal Supplement for Dogs, Cats, Birds, Guinea Pigs, and Rabbits | Pet Herbal Blend for Overall Health | 1 Fluid Ounce Glass Bottle | Manufactured in the USA Review
By Marcus Bell · Dog nutrition editor · Published 2026-05-08 · Updated 2026-06-21
Vibactra Immune Support is a bittersweet liquid built on a 456 mg proprietary blend of mustard seed, black seed, olive leaf, pau d'arco bark, clove, and citrus, marketed for immune support, a healthy microbiome, antioxidant support, and a normal inflammatory response, with a 4.5 star average across roughly 1,400 reviews.
Owners already using Amber NaturalZ herbal liquids who want a version specifically positioned for immune support and gut microbiome balance rather than a single-symptom formula.
Skip if
Your dog has a nut allergy, since this specific formula is flagged with a nut allergen note, or you need a supplement for a diagnosed immune condition rather than general wellness support.
Form Liquid
Flavor Bittersweet
Benefits Immune Support
Best for Use For: Immune Support, A Healthy Microbiome For Balanced Immunity, Fighting Free Radicals, And Supporting A Healthy Inflammatory Response.
Weight 1 Ounces
Our scorecard
4.5/5overall
Owner rating4.5/5
4.5 average across 1,400 owner ratings
Popularity4.0/5
1,400 owner reviews, more than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other dog food and health supplements we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
["Vibactra Immune Support delivers a 456 mg proprietary blend of mustard seed, black seed, olive leaf, pau d'arco bark, clove, and a grapefruit and lemon citrus mix in a bittersweet 1 fluid ounce liquid. Amber NaturalZ markets it around immune support, a healthy microbiome, antioxidant support, and a normal inflammatory response.", 'It ships with an applicator and insert, priced at $27.97, and is intended for a wide range of pets including dogs, cats, birds, guinea pigs, and rabbits. This specific formula carries a nut allergen flag on the label.', 'It has built up roughly 1,400 reviews with a 4.5 star average, a strong sample size for a niche herbal liquid, though bought_last_month showed 0 units at this snapshot.']
Pros
Transparent 456 mg named herb blend rather than a vague proprietary mix
Large review base of about 1,400 with a strong 4.5 star average
Multi-species formula usable across dogs, cats, birds, guinea pigs, and rabbits
Comes with an applicator for easier dosing
Cons
Carries a nut allergen flag, so it's not suitable for pets with that sensitivity
Bittersweet flavor may be a hurdle for picky eaters
0 units bought in the past month at this snapshot, a weaker recent sales signal
Specifications
Form
Liquid
Flavor
Bittersweet
Benefits
Immune Support
Best for
Use For: Immune Support, A Healthy Microbiome For Balanced Immunity, Fighting Free Radicals, And Supporting A Healthy Inflammatory Response.
Weight
1 Ounces
Performance notes
The named blend of mustard seed, black seed, olive leaf, pau d'arco bark, clove, and citrus is consistent with other Vibactra-line products from Amber NaturalZ, and the label's own language ties it to immune support, gut microbiome balance, antioxidant activity, and a normal inflammatory response rather than any specific disease claim.
What buyers say
A 4.5 star average across roughly 1,400 reviews signals a large and largely satisfied customer base for this specific formula, even though the 0 units bought in the past month at this snapshot suggests slower recent turnover.
This formula carries a nut allergen flag on the label, so it's not appropriate for pets with a known nut sensitivity. Always check the full label and talk to your vet if your pet has food allergies.
What does immune support mean here?
The label describes general benefits like immune support, a healthy gut microbiome, antioxidant support, and a normal inflammatory response. It's formulated to support overall wellness, not to diagnose or treat a specific condition.
How is this different from Amber's other Vibactra products?
This version is specifically positioned around immune support and carries its own allergen notes and ingredient details, so compare labels if you're choosing between multiple Amber NaturalZ formulas.
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