Lemon Balm Toxic?

Updated 2026-03-06| 5 min read| 3,194 found this helpful

Lemon Balm is confirmed non-toxic to cats, dogs, and horses, with no documented animal poisoning cases in peer-reviewed scientific literature.

Despite its non-toxic classification, Lemon Balm is not approved or suitable for use as feed for any companion or livestock animals.

It may be visually confused with multiple other non-toxic Lamiaceae family plants, so misidentification poses no extra poisoning risk.

FAQ

Is Lemon Balm toxic to Humans?

No documented poisoning symptoms reported. Excessive consumption may cause mild, temporary gastrointestinal discomfort as a general non-specific adverse reaction. (Non-toxic)

Is Lemon Balm toxic to Cats?

No documented poisoning symptoms reported. Large ingestions may rarely lead to mild vomiting or loose stool. (Non-toxic)

Is Lemon Balm toxic to Dogs?

No documented poisoning symptoms reported. Large ingestions may rarely lead to mild vomiting or loose stool. (Non-toxic)

Is Lemon Balm toxic to Horses?

No documented poisoning symptoms reported. Large ingestions may rarely lead to mild digestive upset. (Non-toxic)

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Toxicity Details

Humans

Non-toxic

No documented poisoning symptoms reported. Excessive consumption may cause mild, temporary gastrointestinal discomfort as a general non-specific adverse reaction.

Cats

Non-toxic

No documented poisoning symptoms reported. Large ingestions may rarely lead to mild vomiting or loose stool.

Dogs

Non-toxic

No documented poisoning symptoms reported. Large ingestions may rarely lead to mild vomiting or loose stool.

Horses

Non-toxic

No documented poisoning symptoms reported. Large ingestions may rarely lead to mild digestive upset.

Toxicity Snapshot

Toxic PartsNo toxic parts identified in available literature; no recorded animal poisoning events linked to this plant. Not recommended for use as animal feed.

Exposure RouteIngestion is the only potential exposure route; intact skin contact with Lemon Balm plant material poses no known irritation or toxicity risk.

Toxic Compounds

First Aid & Prevention

First 30 Minutes

• Wipe any remaining plant material from the mouth of the animal or human that ingested Lemon Balm, and offer small sips of fresh water.
• Monitor the exposed individual for 2 to 3 hours for any signs of unusual discomfort or adverse reactions.

Contact Vet Immediately

• Contact a veterinarian immediately if your pet shows persistent vomiting, diarrhea, or lethargy after consuming large quantities of Lemon Balm.
• Seek veterinary advice immediately if you are uncertain of the identity of the plant your pet ingested.

Prevention

• Store fresh or dried Lemon Balm intended for human use out of reach of pets and livestock to avoid accidental overconsumption.
• Never intentionally feed Lemon Balm to companion animals or livestock, as it is not suitable for use as feed.

Treatment & Prognosis

• Supportive care (e.g. fluid administration, anti-emetics for rare mild GI upset) is sufficient for any adverse reactions, no specific antidote is required.
• Follow guidance from a medical professional or veterinarian for management of any rare, unusual adverse reactions.

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Professional Toxicology

Scientific NameMelissa officinalis

AliasesBalm、Common Balm、Balm mint

Toxicity Grade

HumansNon-toxic

CatsNon-toxic

DogsNon-toxic

HorsesNon-toxic

Target Organs

No specific organ toxicity reported

Mechanism of Action

• No toxic mechanisms identified in available scientific literature; no recorded poisoning events in humans or common domestic animals.

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Ruminants (cattle, sheep, goats): No documented toxicity cases reported, but the plant is not recommended for use as feed

Small companion mammals (rabbits, guinea pigs, hamsters): No reported toxicity events, though excessive consumption may cause mild digestive upset

Confusion Risk

The following plants look similar and may be confused:

Mint species Mentha spp.

Visually similar due to shared serrated leaf shape and aromatic foliage from the Lamiaceae family; mint species have a distinct mint (not lemon) scent when crushed, and are also non-toxic.

White dead-nettle Lamium album

Shares opposite leaf arrangement and clustered small flowers with Lemon Balm; it produces distinctive white bilabiate flowers, and is non-toxic.

European gypsywort Lycopus europaeus

Has a similar serrated leaf structure to Lemon Balm; it lacks the characteristic lemon scent of Lemon Balm when crushed, and is non-toxic.

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Related Toxic Plants

Perilla

Perilla frutescens

Moderate to High, toxic to dogs, cats, and ruminant animals

Diviner's Sage

Salvia divinorum

Low to Moderate, may cause neurological adverse effects in humans and pets

Wall Germander

Teucrium chamaedrys

Moderate, linked to acute liver damage in humans and animals

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Data Sources

1. ASPCA Animal Poison Control

2. CliniTox (Universität Zürich)

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.