From 4-Legger® - Makers of 4-Legger USDA Certified Organic Dog Shampoo

Ingredient Name
Natural or Synthetic?
How Safe Is It?
Can It Be Organic?
Learn more
Panthenol
Image
Image
Image
A form of Vitamin B5 it is used for skin conditioning and to control static. It has no links to toxicities but does have data gaps and implicit safe concentration limits in products.
Paraben
Image
Image
Image
Parabens are a class of preservatives or fragrances that are not planet friendly (ecotoxic) with strong ties to hormone (endocrine system) disruption.
Patented optical brightener
Image
Image
Image
Also referred to as optical brighteners or fluorescent whiteners, are a mixture of synthetic ingredients that appear colorless but when exposed to UV light, they reflect back blue which makes the coat look shiny and bright and make whites look more "white". 

They are not biodegradable and more information is needed on their safety. They have links to allergies. Give the lack of safety studies we've flagged them as a concern.
PEG-20
Image
Image
Image
Has links to non-reproductive organ system toxicity (moderate) and high contamination concerns from ethylene oxide and 1,4-dioxane (both have links to cancer).
PEG 120 Methyl Glucose Dioleate
Image
Image
Image
The polyethylene glycol ether of the diester of  Methylglucose and Oleic Acid it is thought to be relatively safe with some links to skin irritation and is not recommended for broken or irritated skin as it would allow for skin penetration. It does have links to contamination from ethylene oxide and 1,4-dioxide which is why we've given it a very bad ranking.
PEG-150
Image
Image
Image
Has links to sensory organ system toxicity (moderate) and high contamination concerns from ethylene oxide and 1,4-dioxane (both have links to cancer).
Pentylene Glycol
Image
Image
Image
A synthetic thickening agent that can act as a preservative but is also used to make skin "feel" hydrated. It can cause skin irritation to some animals with sensitivities so we have ranked it as "Pretty Safe" as a caution.
Peppermint Essential Oil
Image
Image
Image
Works to balance the sebum on your dog's skin and coat while increasing the blood flow to the skin to heal and provide protection against bacteria and viruses.

As with all essential oils, using a high grade essential oil that has been naturally extracted is imperative for the health and safety of your pet! 
Petroleum Jelly
Image
Image
Image

Derived from petroleum (not planet friendly - ecotoxic) with links to organ system toxicity with contamination concerns by PAHS - with links to endocrine disruption, cancer, bioaccumulation, and organ system toxicity.

Note: There are many different brands of petroleum jelly with a vast spectrum of ingredient purity. While we'd not use it on ourselves or our dogs, if you are going to use it, make sure you buy a reputable name brand.

Phenoxyethanol
Image
Image
Image

A relatively new preservative. Let's first note that it is safer than some other preservatives like formaldehyde, paraben, and methylisothiazolinone preservatives. There is some evidence that it may cause skin irritation or allergies in some dogs and that it may have links to organ system toxicity. 

 

It is also is a sensitizer meaning your dog can develop an allergic reaction to it after using it for some time with no problems.

Note:  This is a synthetic ingredient that is not allowed by Ecocert for use in natural or organic products.  If the bottle says "natural" or "organic" and it also says "phenoxyethanol" you would be wise to avoid any products manufactured by this company. 

Phospholipid CDM 

Sodium Coco PG-dimonium Chloride Phosphate

Image
Image
Image

A fairly new surfactant, hair-conditioning agent and foam booster. There is not a lot of data on this ingredient (yet) but it is so far generally regarded as safe. 

Plant-derived and coconut-based cleansers

Image
Image
Image

Without knowing what the ingredient is, pet parents should be very cautious when they see this ingredient. It is likely they are using this phrase because they don't want to tell you what it is. 

Polyglyceryl-4 Oleate
Image
Image
Image

We gave this ingredient a green rating but want to point out a caution. There are animal and petroleum sources so you will need to ask for the ingredient source wen you see this ingredient listed.

A synthetic combination of 4 glycerine molecules into 1 large molecule that makes it more moisturizing, added to a fatty acid under alkaline conditions - that joins the 2 chemicals into one new molecule. 

It is generally regarded as a safe and effective moisturizer - certainly safer than the alternatives like polyethylene glycol (PEG) and triethanolamine (TEA). It is also approved to be used in ECOCERT certified organic products. 

Polyethylene Glycol (PEG)
Image
Image
Image
Works to hold on to moisture but has some links to organ system toxicity. Concerns with contamination by ethylene dioxide and 1,4-dioxane (both linked to cancer) from the manufacturing process.

Polyquarternium 

Image
Image
Image
Has links to non-reproductive organ system toxicity (moderate),

Has high contamination concerns (high) from acrylamide (which has links to cancer).

Polysorbate 20

(also called Polysorbate 40, Polysorbate 60, Polysorbate 80, or Tween 20) 

Image
Image
Image

Polysorbate, in its original form, is a harmless sorbitol (vegetable based sugar alcohol). 

When polysorbate has a 20, 40, 60, 80 after it, it has been treated with 20 (40, 60, or 80) parts of ethylene oxide. 

The resulting ingredient is an emulsifier. 

We have rated it as "Very Bad" due to possible contamination concerns. The scientific literature also has limited evidence of sensory organ toxicity.

Read the blog post about Polysorbate 20 to learn more about this ingredient. 

Potassium Benzoate

Image
Image
Image
A mild preservative used to extend the shelf-life of products by preventing the growth of bacteria, fungi, and molds. It is used as a safer alternative to parabens. Some allergies

Potassium Citrate

Image
Image
Image
Acts as a buffering and chelating agent it is generally recognized as safe.
Potassium cocoate
Image
Image
Image
Saponified coconut oil made from mixing potassium hydroxide with coconut oil. When the reaction is done, there is zero potassium hydroxide left in the final finished product. 

It is safe and non-toxic! Extremely hydrating, a great moisturizer that helps to provide a protective layer, retaining moisture in the skin while allowing the skin to breathe. As a mild oil, it is very good for inflamed or irritated skin, and on dogs with skin sensitivities.
Potassium Hydroxide

also known as lye and caustic potash
Image
Image
Image
This is one of the confusing ingredients. It is a synthetic used in the natural process of making soap. When used to saponify oils, there is none left in the final product hence why products can still be USDA Certified Organic even though they started with a non-organic product the final product can be 75%-95% organic.
Potassium olivate
Image
Image
Image
Saponified olive oil made from mixing potassium hydroxide with olive oil. When the reaction is done, there is zero potassium hydroxide left in the final finished product. 

It is safe and non-toxic! Rich in vitamins, minerals, natural fatty acids, and antioxidants. Known for its ability to nourish, rejuvenate, and protect the skin.
Potassium jojobate
Image
Image
Image
Saponified jojoba oil made from mixing potassium hydroxide with coconut oil. When the reaction is done, there is zero potassium hydroxide left in the final finished product. 

It is safe and non-toxic! A great cleanser and an excellent moisturizer. Jojoba also contains fatty acids that help to rejuvenate and restore dry skin.
Potassium Sorbate
Image
Image
Image

Generally regarded as safe, it is a mild preservative used to repalce parabens. It is often found in products with a more acidic pH, which we do not recommend for animals but fine for human skin. It is rare to have an allergic reaction.

Propanediol
Image
Image
Image
Can increase skin absorption. Has a low concern for endocrine disruption and high concern for skin and eye irritation.
Proprietary Blend of Surfactants, Moisturizers or Conditioners
Image
Image
Image
Don't fall for this marketing trick. If they aren't willing to tell you what is actually in the product you can rest assured it is ingredients you don't want on your dog!
Propylene Glycol
Image
Image
Image
Used as a skin conditioner that can retain moisture but has links to skin irritation, organ system toxicity and can increase the skin's absorption.
Propyl Paraben
Image
Image
Image
A preservative that can mimic estrogen and likely act as a hormone system disruptor (endocrine system). Also, not planet friendly.