When it comes to caring for your horse’s coat, mane, tail, and skin, not all grooming products are created equal. Some common ingredients found in shampoos, conditioners, sprays, and detanglers can irritate skin, harm hair, or even pose long-term health risks for both horses and the environment. Here’s what to watch out for. Looking for what to use while grooming/bathing? Click here.
1. Sulfates
Sulfates, such as sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES), are strong cleansing agents that create lather and remove dirt and oil.
Why to avoid:
- Strips natural oils – Can leave the coat dry, brittle, and frizzy.
- Skin irritation – May worsen conditions like dermatitis or sensitive skin.
- Hair damage – Repeated use can weaken the hair shaft.
- Environmental impact – Can persist in waterways, disrupt aquatic life, and react to form harmful byproducts.
2. Parabens
Synthetic preservatives like methylparaben, propylparaben, and butylparaben prevent bacterial growth but mimic estrogen in the body.
Risks:
- Hormonal disruption and potential reproductive concerns.
- Skin irritation or allergic reactions.
- Persistent in water, potentially impacting ecosystems.
3. DMDM Hydantoin
A preservative that slowly releases formaldehyde, a known irritant and allergen.
Risks:
- May trigger dermatitis or hair loss in sensitive horses.
- Long-term exposure concerns for humans and animals.
4. PEGs (Polyethylene Glycols)
Used as thickeners, emulsifiers, and moisture-retaining agents.
Risks:
- Skin irritation and increased absorption of toxins.
- Potential contamination with ethylene oxide and other harmful byproducts.
- Environmental persistence; not readily biodegradable.
5. Phthalates
Plasticizers often found in sprays, gels, and fragrances.
Risks:
- Endocrine disruption, potential reproductive issues, and long-term health concerns.
- Skin or scalp irritation.
- Persistent environmental pollutants.
6. Silicones
Commonly found as dimethicone, cyclomethicone, or water-soluble variants.
Risks & considerations:
- Can coat hair and skin, leading to buildup, clogged pores, and reduced moisture absorption.
- Not readily biodegradable; may accumulate in waterways.
- Water-soluble alternatives may reduce buildup and environmental impact.
7. Formaldehyde & Formaldehyde-Releasing Preservatives
Includes polyquaternium-7, quaternium-15, DMDM Hydantoin, Diazolidinyl Urea, and others.
Risks:
- Known carcinogen (IARC).
- Skin, scalp, and respiratory irritation.
- Environmental concerns due to release into water and air.
8. 1,4-Dioxane
A byproduct of ethoxylation found in SLES, PEGs, and ingredients ending in “-eth”.
Risks:
- Probable human carcinogen.
- Skin and eye irritation.
- Highly soluble in water and environmentally persistent.
9. Petroleum-Based Ingredients
Includes mineral oil, paraffins, and petrolatum derivatives.
Risks:
- Forms a barrier that traps moisture but provides little nourishment.
- Can clog pores and inhibit hair or skin health.
- Non-biodegradable and potentially contaminated with harmful hydrocarbons.
10. Synthetic Fragrances & Artificial Colors
Used for scent and vibrant coloring in shampoos and sprays.
Risks:
- May contain phthalates or other hormone-disrupting chemicals.
- Can cause skin irritation, respiratory issues, or allergic reactions.
- Artificial colors like FD&C dyes may be linked to health concerns.
11. Polysorbates
Emulsifiers and surfactants often treated with ethylene oxide.
Risks:
- Contamination with ethylene oxide or 1,4-dioxane can occur.
- Linked to skin allergies, reproductive toxicity, and developmental concerns.
12. EDTA (Tetrasodium, Trisodium, Disodium)
Chelating agents used to bind metals in formulas.
Risks:
- Penetration enhancers that allow other chemicals to absorb deeper into the skin.
- Some forms are derived from ethylene diamine, formaldehyde, and sodium cyanide.
13. Phenoxyethanol
A preservative made from phenol and ethylene oxide.
Risks:
- Potential contamination from precursor chemicals.
- Over time, trace exposure can accumulate.
14. Cocamide DEA (Coconut Diethanolamide)
Foaming agent derived from coconut oil and diethanolamine (DEA).
Risks:
- Classified as a Group 2B carcinogen.
- Can form nitrosamines, which are known carcinogens.
- California Prop 65 lists it as a chemical requiring warning labels above safe levels.
15. Methylchloroisothiazolinone / Methylisothiazolinone (CMIT/MIT)
Preservative blend in some shampoos and sprays.
Risks:
- Potent sensitizer causing rashes, itching, or chemical burns.
- Banned in leave-on cosmetics in the EU; still used in some U.S. products.
- Horses with sensitive skin may show tail rubbing, flaking, or dull coats.
Additional Ingredients to Consider Avoiding
- Sodium Hydroxide (lye) – harsh pH adjuster that can irritate skin.
- Fragrance allergens (limonene, linalool, citronellol) – common irritants.
- Triclosan / Triclocarban – antibacterial agents with endocrine and environmental concerns.
- BHT / BHA – synthetic antioxidants linked to hormone disruption.
Bottom Line:
For horses, sensitive skin and long exposure times make ingredient safety especially important. Opt for:
- Sulfate-free, paraben-free, PEG-free shampoos.
- Natural oils and botanical extracts.
- Silicone alternatives that are biodegradable.
- Transparent brands that avoid CMIT/MIT, Cocamide DEA, and formaldehyde releasers.
By reading labels and choosing safer alternatives, you’re protecting your horse’s skin, coat, and OVERALL, health — and also minimizing environmental impact.
NoT sponsered or affilIATED WITH Hairy Pony. HOWEVER, they are my current favorite transparent-ethically clean grooming products for the cross ties. Next to Espana Silk, shampoos, conditioners, and detanglers smell divine.
