Angel’s Eyes (marketed as “Angels’ Eyes”) is a line of oral tear-stain supplements and topical wipes for dogs and cats, and the current US formulations sold by the brand are botanical products that the company states contain no antibiotics. That matters because an earlier generation of tear-stain products under this name — and several competing brands — contained the antibiotic tylosin tartrate and drew FDA warning letters in 2014. If you are searching for Angel Eyes because your dog has reddish-brown streaks under the eyes, the more useful question is not which powder to buy, but whether the staining is cosmetic or a symptom of something a veterinarian should examine.
The short answer. Tear stains are caused by porphyrins — iron-containing pigments in tears and saliva that oxidise to a rust colour on light fur. Angel’s Eyes ingestibles are supplements, not drugs, and are not approved by the FDA to treat any condition. The brand’s own FAQ page states plainly: “No, there are no antibiotics in our products” (verified on angelseyesonline.com, 14 September 2026). Independent evidence that any oral tear-stain supplement reduces staining is limited; one 2026 controlled feeding trial found that three Chinese herbal extracts lowered tear-staining scores in dogs, but none of those extracts is the Angel’s Eyes formula. Persistent staining with squinting, odour, or a change in discharge is a veterinary problem, not a grooming one.
What are tear stains actually made of?
Tear staining is a downstream effect of epiphora — an overflow of tears onto the face. VCA Animal Hospitals describes epiphora as “a symptom rather than a specific disease,” arising either from insufficient drainage through the nasolacrimal ducts or from excessive tear production. The listed clinical signs include dampness beneath the eyes, reddish-brown staining of the fur, odour, skin irritation, and skin infection.
The pigment itself comes from porphyrins. The Merck Veterinary Manual’s chapter on the nasolacrimal and lacrimal apparatus lays out the plumbing: tear film is produced by the lacrimal gland and the gland of the third eyelid, drains through two nasolacrimal puncta near the medial canthus into the canaliculi, lacrimal sac, and nasolacrimal duct, and exits at a nasal punctum. Anything that blocks or overwhelms that pathway pushes tears onto the face, where porphyrins oxidise in air and light.
This is why a supplement can only ever be part of the picture. If you want the fuller mechanism, our guide to what causes tear stains on dogs walks through the anatomy in more detail.
Causes a supplement cannot touch
| Underlying cause | What it is | Can an oral supplement plausibly affect it? |
|---|---|---|
| Brachycephalic facial conformation | Flat-faced skull shape means tear film rolls off rather than entering the duct (VCA) | No — anatomical |
| Imperforate lacrimal puncta | Punctum failed to open during development; an infrequent cause of epiphora in young dogs (Merck) | No — requires surgical opening |
| Dacryocystitis | Inflammation of the lacrimal sac from debris, foreign bodies, or masses; causes epiphora and refractory conjunctivitis (Merck) | No — needs flushing and veterinary treatment |
| Entropion, ectropion, distichia, ectopic cilia | Lid and lash abnormalities that irritate the eye (VCA) | No — often surgical |
| Corneal ulcer, glaucoma, eye injury | Painful conditions that drive reflex tearing (VCA) | No — urgent veterinary cases |
| Hair obstructing the puncta, or a debris plug in the duct | Mechanical blockage (VCA) | No — grooming or flushing |
| Diet, water mineral content, gut and iron/porphyrin metabolism | The area where oral products make their pitch | Possibly, and this is where the limited evidence sits |
Read that table as a triage tool. Six of the seven rows are reasons to book an appointment before you buy anything.
What is in Angel’s Eyes today?
The brand’s product pages describe botanical formulas. The Natural Tear Stain Powder page lists an active botanical blend of cranberry powder, Oregon grape root, and marshmallow root, with sweet potato and brown rice among the inactive ingredients, and states “NASC certified. No wheat, corn, soy, or artificial colors.” The NATURAL PLUS version adds eyebright and olive leaf. The brand’s FAQ page answers the antibiotic question directly and also states that “The active ingredients in Angels’ Eyes are a proprietary blend composed of natural antioxidants.”
Two things are worth separating here. The ingredient list is a matter of public record on the label. The mechanism claims attached to it — binding iron and magnesium in tears, preventing bacterial biofilm, “normalizing tear composition” — are the manufacturer’s marketing descriptions, not findings from published trials on these products. No peer-reviewed study of the Angel’s Eyes formula was located during this review.
How to read any tear-stain supplement label
| What you see on the label | What it actually tells you |
|---|---|
| “NASC certified” | The company participates in the National Animal Supplement Council quality programme. It is a manufacturing and labelling standard, not evidence that the product works. |
| “No antibiotics” | A meaningful statement post-2014, and one worth confirming on the current label of whatever brand you are considering. |
| “Proprietary blend” | Individual ingredient amounts are not disclosed, so you cannot compare dosing across brands. |
| “Veterinarian recommended” | A marketing phrase, not a regulatory approval. No tear-stain supplement is FDA-approved as a drug. |
| Structure/function wording (“supports”, “helps maintain”) | Deliberate compliant phrasing. Wording that promises to treat, cure, or prevent a disease would make the product an unapproved new animal drug. |
| Named botanicals with amounts | The most useful label of all — it lets you check the ingredient against published research yourself. |
Why did the FDA get involved, and does it still matter?
In August 2014 the FDA issued warning letters to three Florida companies over tear-stain products. As reported in JAVMA News (AVMA, published 1 October 2014), none of the affected products were approved as drugs, yet all were marketed to treat conditions associated with tear stains, and some contained the antimicrobial tylosin tartrate. The letters were dated 28 August 2014. The affected lines included Angels’ Glow, Angels’ Eyes, and Pets’ Spark sold in the US, plus Clean Eyes, Sparkle Eyes, Glow Groom, and Health Glow made for export. Per the same report, the Angels’ Eyes products were made by I’m a Little Teacup.
Two regulatory points from that reporting are worth keeping straight. First, tylosin is not approved for any use in dogs or cats. Second, a product becomes a drug in regulatory terms if it is intended to mitigate, treat, or prevent disease, or to affect the structure or function of the body — which is why the FDA cited company statements that their products kill bacteria or eliminate infections.
The current picture is different. As of 14 September 2026, the Angels’ Eyes product pages and FAQ describe botanical formulas and state there are no antibiotics in the products. Whether any given bottle on a shelf or a third-party marketplace matches the current formulation is a separate question — check the actual label, and be cautious with grey-market or imported tear-stain powders whose ingredient lists may be incomplete.
There is also a clinical reason to avoid low-dose antibiotics for a cosmetic complaint. VCA states that low doses of some antibiotics are no longer recommended because of the risk of bacterial antibiotic resistance, and that short courses of appropriately dosed antibiotics can be reserved for severe cases where there is a secondary skin infection. Antibiotic decisions belong to your veterinarian.
Does any research support tear-stain supplements?
Evidence remains limited, and it is important to be precise about what exists.
VCA’s position on the category is blunt: many remedies have been recommended, none have proven to be 100% effective, some over-the-counter products “have not been proven to be effective in research trials,” and some may be harmful. The same article notes there is some evidence that daily probiotics can be helpful, but that it can take a couple of months to see improvement.
The strongest recent data point is not about a commercial brand at all. Wang et al., “Effects of Traditional Chinese Herbal Extracts on Tear Staining, Iron Status, Immune Function, and Antioxidant Capacity in Dogs,” published in Animals in 2026 (16(11):1596; DOI 10.3390/ani16111596; PMID 42278031), fed forty Poodle and Bichon dogs diets supplemented with Chrysanthemum morifolium, Cassia semen, or Poria cocos. The authors report that all three supplements reduced tear staining, “as shown by lower scores and shorter stain length versus control,” and that two of the three improved markers of iron status and porphyrin metabolism. Their stated conclusion is that these herbs “are promising dietary strategies for reducing tear staining in dogs.”
That is a real, controlled result — and it is not a result about Angel’s Eyes. The amounts used in that study were dietary inclusion rates in a research setting, not a consumer dosing recommendation. It does, however, lend biological plausibility to the general idea that diet and gut-mediated iron and porphyrin handling can influence staining. Research suggests a direction; it does not yet validate a product.
Realistic expectations, and what “working” looks like
The brand’s own materials set a slow timeline: the FAQ page states it is typical to see results as early as four weeks, “but on average between 6-10 weeks,” when using the full regimen. Whatever product you use, follow your product label or your veterinarian’s direction for amounts and frequency — this article does not recommend a dose.
One structural point owners often miss: already-stained fur does not un-stain. Porphyrin-pigmented hair has to grow out or be trimmed away. Anything that changes tear chemistry can only affect new growth, which is why an honest assessment means looking at the hair closest to the skin, not the tips. A phone photo in the same light every fortnight beats memory. Our overview of how dog tear stain removers work covers the topical side of that equation.
Common mistakes owners make with tear stains
- Reaching for hydrogen peroxide or bleach. VCA explicitly advises avoiding any product containing hydrogen peroxide near the eyes, because these products can cause severe damage if inadvertently splashed into the eyes. The same caution applies to human whitening products, makeup removers, and cornstarch-and-peroxide home pastes circulating on social media.
- Treating the stain instead of the cause. If the tearing is driven by a lid abnormality or a blocked duct, no powder will resolve it.
- Assuming staining is always porphyrins. Damp fur also grows yeast and bacteria, which produce a different look and often an odour. Odour is a signal to have the skin examined.
- Leaving the area wet. VCA notes that keeping the area as clean and dry as possible, removing build-up, and trimming the fur short around the eyes can help. Gentle daily cleaning is genuinely useful; see choosing dog eye wipes for what to look for.
- Stacking products. Running a powder, chews, a topical solution, and a homemade rinse at once means you cannot tell what, if anything, is doing the work.
- Starting a supplement during an active flare. A sudden change in discharge is a reason to see a vet, not a reason to start a cosmetic product.
Myth vs fact
| Claim you will see online | What the sources actually support |
|---|---|
| “Tear stains are just cosmetic.” | Often true, but not always. VCA lists conjunctivitis, allergies, eye injuries, abnormal eyelashes, corneal ulcers, entropion, ectropion, and glaucoma among causes of increased tearing. |
| “Angel’s Eyes contains antibiotics.” | The brand’s current FAQ states there are no antibiotics in its products (verified 14 September 2026). Older tylosin-containing tear-stain products, including ones sold under this name, were the subject of FDA warning letters in 2014. |
| “It’s proven to work.” | No peer-reviewed study of this formula was found. Evidence for the category overall remains limited. |
| “Tap water causes tear stains.” | Frequently repeated, including in brand FAQs, but no controlled veterinary trial supporting it was located for this article. |
| “A supplement will clear existing stains.” | Stained hair must grow out or be trimmed. Only new growth can change. |
| “If it’s sold in a pet store, the FDA approved it.” | Tear-stain supplements are not FDA-approved drugs. |
When to call your vet
Stop the cosmetic project and book an appointment if you see any of the following, which VCA and Merck identify as signs of ocular disease rather than simple staining:
- Squinting or holding one eye closed — a marker of ocular pain, and a reason for same-day attention
- A sudden change in the amount or character of discharge, particularly if only one eye is affected
- Green, yellow, or mucopurulent discharge — Merck associates mucopurulent exudate with keratoconjunctivitis sicca and with dacryocystitis, where inflammatory exudate may reflux from the lacrimal puncta
- Pawing or rubbing at the face, which risks corneal injury
- Cloudiness of the eye surface, redness, or visible change in the cornea
- Odour, redness, or discharge in the stained skin itself — VCA lists skin irritation and skin infection among epiphora’s signs, and reserves appropriately dosed antibiotics for secondary skin infection
- A swelling or draining tract below the medial lower eyelid — Merck notes dogs with chronic dacryocystitis occasionally develop a draining fistula there
- Conjunctivitis that will not resolve with treatment, which Merck flags as a feature of dacryocystitis
If you are unsure which bucket you are in, types of dog eye discharge and signs of a dog eye infection are useful starting points — but a fluorescein stain test, which VCA describes as one of the simplest ways to assess whether tears are draining into the nose, takes a veterinarian about a minute.
A decision framework
Work down this list in order:
- Is the eye itself comfortable? No squinting, no pawing, no cloudiness, clear rather than coloured discharge, both eyes the same. If not, go to the vet first.
- Has your vet ruled out a structural or drainage cause? Lid conformation, lashes, duct patency. If not, that examination comes before any purchase.
- Is the stained skin healthy? No odour, no redness, no crusting. If not, that is a dermatology question.
- Is the staining stable and long-standing rather than new? New or one-sided staining in an adult dog deserves a look.
- Only then is this a cosmetic problem — and cosmetic problems are best addressed with daily cleaning, keeping the fur trimmed and dry, and, if you choose, a clearly labelled supplement used according to its label, with a photo diary and a realistic multi-week horizon.
FAQ
Is Angel Eyes safe for dogs?
The current Angels’ Eyes tear-stain ingestibles are marketed as botanical supplements, and the company states its products contain no antibiotics. Supplements are not FDA-approved drugs, so safety and effectiveness have not been reviewed by the FDA. Talk to your veterinarian before starting any supplement, particularly for a dog on medication, a pregnant or nursing dog, or a puppy.
Does Angel Eyes still contain tylosin?
The brand’s FAQ page states there are no antibiotics in its products, checked on 14 September 2026. Tylosin-containing tear-stain products — including ones sold under the Angels’ Eyes name at the time — were the subject of FDA warning letters dated 28 August 2014, as reported by JAVMA News. Always read the label on the specific product you are holding.
How long does Angel Eyes take to work?
The manufacturer’s FAQ says it is typical to see results as early as four weeks, but on average between 6-10 weeks when using the full regimen. Existing stained fur does not change colour; only new growth can.
Do tear-stain supplements actually work?
Evidence remains limited. VCA states that over-the-counter tear-stain products have not been proven effective in research trials and that some may be harmful. A 2026 controlled trial in Animals found three Chinese herbal extracts reduced tear-staining scores in forty dogs, which supports the general idea that diet can influence staining, but that study did not test any commercial brand.
Can I use hydrogen peroxide or human whitening products on tear stains?
No. VCA advises avoiding any product containing hydrogen peroxide near the eyes, because these products can cause severe damage if inadvertently splashed into the eyes.
When are tear stains a medical problem rather than a cosmetic one?
When there is squinting, pawing, cloudiness, a sudden change in discharge, green or yellow discharge, odour, or staining that appears suddenly or affects only one eye. Those warrant a veterinary examination.
References
- Barnes C, Llera R, Ward E. “Eye Discharge (Epiphora) in Dogs.” VCA Animal Hospitals / LifeLearn, last updated 30 August 2023. https://vcahospitals.com/know-your-pet/eye-discharge-or-epiphora-in-dogs
- Hamor RE. “Nasolacrimal and Lacrimal Apparatus in Animals.” Merck Veterinary Manual, professional version, full review February 2023, last updated September 2024. https://www.merckvetmanual.com/eye-diseases-and-disorders/ophthalmology/nasolacrimal-and-lacrimal-apparatus-in-animals
- JAVMA News. “FDA warns makers of unapproved ‘tear stain’ products.” American Veterinary Medical Association, published 1 October 2014. https://www.avma.org/javma-news/2014-10-15/fda-warns-makers-unapproved-tear-stain-products
- Wang E, Hong X, Zhao N, et al. (Yang C, corresponding author). “Effects of Traditional Chinese Herbal Extracts on Tear Staining, Iron Status, Immune Function, and Antioxidant Capacity in Dogs.” Animals 2026;16(11):1596. DOI: 10.3390/ani16111596. PMID: 42278031. https://pmc.ncbi.nlm.nih.gov/articles/PMC13255681/
- Angels’ Eyes. “Frequently Asked Questions.” angelseyesonline.com, accessed 14 September 2026. https://angelseyesonline.com/pages/faqs
- Angels’ Eyes. “Angels’ Eyes Natural Tear Stain Powder, Chicken Flavor” product page. angelseyesonline.com, accessed 14 September 2026. https://angelseyesonline.com/products/angels-eyes-natural-chicken-flavor
Veterinary disclaimer: This article is independent consumer education and is not veterinary advice. Dog Health Insider is not affiliated with Angels’ Eyes or any supplement manufacturer. Product descriptions reflect what was published on the manufacturer’s own pages on 14 September 2026 and may change. No supplement is approved by the FDA to diagnose, treat, cure, or prevent any disease in dogs. Always consult your own veterinarian about your dog’s eyes, and seek prompt care for squinting, pain, cloudiness, or a sudden change in discharge.