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
Ginger Essential Oil
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Ginger restores motivation and stimulates willpower and helps relieve sore muscles. It also helps to boost the immune system and helps to decrease pain. It is a great addition to peppermint with a warm woodsy scent.

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! 
Glycerine (vegetable based)
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A by-product of the process of saponification, it is a natural humectant.
Glyceryl caprylate
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While naturally derived from coconut, palm, sunflower (etc) oil, it is considered a synthetic as it requires a multi-step process to synthesize. The first step is saponification of oils to obtain the glycerin. The glycerin is then mixed with stearic acid, a fatty acid that comes from animal and vegetable fats and oils.

It serves primarily as a skin conditioning agent. It can be used in combination with Grapefruit Seed Extract and Potassium Sorbate or other preservatives to boost the anti-microbial properties. 

It can increase skin penetration of other ingredients so be sure all of the other ingredients in the product are safe and non-toxic.

Allowed in EcoCert products but not allowed in USDA certified products through the National Organic Program.
Glyceryl sterate

(glycerol monostearate)
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It is synthetically produced by reacting glycerin with stearic acid, a natural fatty acid derived from palm kernel, vegetable, or soy oil. Stearic acid is one of the most common saturated fatty acids found in nature. A thickener and emollient used to improve the texture and sensory feel of products. It also helps to hydrate and protect the skin, giving your skin that dewy glow.
Green tea extract

Camellia sinesis
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Soothes and protects the skin, reduces sebum, and minimizes signs of aging.
Guar Gum
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Made from guar beans it acts as a natural thickener,  conditioner, and humectant (holds on to moisture)!
Guar Hydroxypropyltrimonium Chloride
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Synthetically derived from guar gum; used in hair conditioning products. Made from guar beans it acts as a natural conditioner and humectant (holds on to moisture)!
Guava leaf juice

(psidium guava leaf extract)
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Packed full of antioxidants, it helps protect the skin from damage and improves the skin tone.