Dr. Squatch Wood Barrel Bourbon Shampoo

A gentle, plant-based shampoo formulated with mild glucoside cleansers, nourishing honey, and a botanical blend of horsetail, rosemary, and nettle to strengthen and soothe the hair and scalp.

Performance Rating: 8.2

This shampoo earns an 8.2/10 for performance due to its exceptionally nourishing and gentle formulation. The primary cleansing agents, Decyl Glucoside and Coco-Glucoside, offer mild, non-stripping cleansing that respects the scalp’s natural lipid barrier. Hydration is deeply supported by humectants like Glycerin, Honey, and Trehalose, while Hydrolyzed Oat Protein and Jojoba Seed Oil work to strengthen and smooth the hair shaft. A robust blend of botanicals—including Horsetail Extract (rich in hair-strengthening silica) and Rosemary Leaf Extract (known for stimulating scalp health)—provides excellent conditioning benefits. However, because it lacks harsh sulfates, users might experience lower lather volume, potentially requiring a second rinse for very oily hair.

Safety Rating: 9.2

With a 9.2/10 for safety, this product boasts an exemplary ingredient safety profile. It completely bypasses high-risk chemicals, opting instead for food-grade, mild preservatives like Sodium Benzoate, Potassium Sorbate, and Gluconolactone. The surfactant system is highly biodegradable and non-irritating to the eyes and skin. The inclusion of Naturally Derived Fragrance and essential oils like Orange Peel Oil and Patchouli Leaf Oil reduces synthetic chemical exposure, although individuals with extreme essential oil sensitivities or specific plant allergies should still perform a patch test due to potential natural allergens.

Final Rating: 8.7

An overall rating of 8.7/10 represents a superior, clean-beauty shampoo that perfectly bridges the gap between efficacy and ingredient integrity. This formula is highly recommended for individuals with dry, damaged, or sensitive scalps who want to avoid harsh synthetic detergents. While it sacrifices some of the high-foaming aesthetics of conventional products, it compensates with an antioxidant-rich, botanical-dense profile that supports long-term hair and scalp health without compromising on safety.

Verdict

This ingredient list reveals an exceptionally gentle, sulfate-free shampoo that prioritizes scalp health and moisture retention. Built on a foundation of Decyl Glucoside and Coco-Glucoside, it utilizes some of the mildest biodegradable cleansers available. These surfactants gently lift away dirt and excess sebum without stripping the hair of its natural oils, making it an excellent choice for individuals with dry, curly, coily, or color-treated hair who struggle with moisture loss during washing. The formula is highly moisturizing, thanks to a robust selection of humectants and emollients. Glycerin, honey, and trehalose work in tandem to draw moisture deep into the hair shaft, while Jojoba Seed Oil provides a lightweight, nourishing barrier that mimics the scalp’s natural sebum to seal in hydration and prevent dryness. The addition of Hydrolyzed Oat Protein is a major benefit, as it temporarily repairs damage, enhances elasticity, and adds structural strength to fine or fragile strands. Furthermore, this shampoo features an impressive array of botanical extracts designed to optimize scalp environment. Rosemary and Nettle extracts are well-known for stimulating the scalp, improving microcirculation, and encouraging healthy hair growth, while Calendula and Comfrey extracts soothe irritation, calm redness, and reduce inflammation on sensitive scalps. Horsetail extract, rich in natural silica, further aids in fortifying the hair structure from root to tip. However, because of its mild surfactant profile, users who rely heavily on silicone-based styling products or heavy waxes may find that this shampoo does not fully cleanse build-up on the first wash, requiring a double cleanse. Additionally, while the formulation is incredibly clean and free of harsh synthetic chemicals, it does contain Naturally Derived Fragrance alongside Orange Peel Oil and Patchouli Oil. While these provide a pleasant natural aroma, essential oils and natural fragrances can sometimes trigger reactions in individuals with severe contact dermatitis or extremely sensitive skin. Overall, this is an outstanding daily-use shampoo for anyone seeking a clean, nourishing, and low-foaming alternative. It delivers deep hydration and scalp care while avoiding common irritants like silicones, parabens, and synthetic sulfates, making it a stellar addition to any hair care routine focused on restoration and gentle maintenance.

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Ingredient Evaluation

📁 Solvents & Bases / 溶剂与基底

🧪 Water (Aqua) / 水

Purpose: Solvent

Concerns: None.

Notes: The primary carrier and solvent for all other active ingredients.

📁 Cleansing Agents & Surfactants / 表面活性剂与清洁剂

🧪 Decyl Glucoside / 癸基葡萄糖苷

Purpose: Mild non-ionic surfactant

Concerns: Generally very safe, but can cause mild irritation in extremely sensitive skin.

Notes: Biodegradable and derived from plant sugars.

🧪 Coco-Glucoside / 椰油基葡萄糖苷

Purpose: Mild non-ionic surfactant

Concerns: Extremely low irritation potential.

Notes: Excellent compatibility with skin and hair, providing gentle cleansing.

🧪 Sodium Stearoyl Lactylate / 硬脂酰乳酰乳酸钠

Purpose: Emulsifier and conditioning agent

Concerns: None.

Notes: Offers moisturization and improves product texture.

📁 Humectants & Hydrators / 保湿剂与补水成分

🧪 Glycerin / 甘油

Purpose: Humectant

Concerns: None.

Notes: Draws moisture into the hair shaft to keep it hydrated.

🧪 Trehalose / 海藻糖

Purpose: Humectant and cell protector

Concerns: None.

Notes: Protects hair from dehydration and environmental stress.

🧪 Honey / 蜂蜜

Purpose: Natural humectant and hair conditioner

Concerns: Rare potential for allergic reactions in those sensitive to bee products.

Notes: Contains antioxidants and minerals that nourish the scalp.

📁 Hair Conditioning & Plant Extracts / 头发调理剂与植物提取物

🧪 Hydrolyzed Oat Protein / 水解燕麦蛋白

Purpose: Hair strengthening and conditioning agent

Concerns: Individuals with extreme gluten sensitivity may choose to patch test.

Notes: Forms a protective barrier on hair, improving elasticity and shine.

🧪 Calendula Officinalis Flower Extract / 金盏花花提取物

Purpose: Soothing botanical extract

Concerns: Individuals with allergies to the Asteraceae family should exercise caution.

Notes: Known for its anti-inflammatory and scalp-soothing properties.

🧪 Equisetum Arvense (Horsetail) Extract / 问荆提取物

Purpose: Botanical strengthening agent

Concerns: None for topical/rinse-off use.

Notes: Rich in silica, which helps improve hair strength and reduce breakage.

🧪 Rosmarinus Officinalis (Rosemary) Leaf Extract / 迷迭香叶提取物

Purpose: Scalp stimulant and antioxidant

Concerns: Can cause contact dermatitis in sensitive individuals.

Notes: Often used to promote healthy hair growth and soothe itchy scalps.

🧪 Symphytum Officinale (Comfrey) Leaf Extract / 聚合草叶提取物

Purpose: Skin-soothing and healing extract

Concerns: Contains pyrrolizidine alkaloids; safe in rinse-off cosmetic applications but usually restricted in leave-on products.

Notes: Rich in allantoin, which accelerates scalp healing and reduces irritation.

🧪 Urtica Dioica (Nettle) Leaf Extract / 荨麻叶提取物

Purpose: Scalp conditioning and sebum regulating agent

Concerns: None in topical, formulated cosmetic products.

Notes: Helps regulate scalp oiliness and can promote healthy hair follicles.

🧪 Simmondsia Chinensis (Jojoba) Seed Oil / 荷荷巴籽油

Purpose: Emollient and hair conditioning agent

Concerns: None.

Notes: Closely matches natural human sebum, providing lightweight moisture without weighing hair down.

🧪 Tocopherol / 生育酚

Purpose: Antioxidant (Vitamin E)

Concerns: Low risk of skin sensitization.

Notes: Protects both the formulation oils and the hair from oxidative damage.

📁 Fragrances & Essential Oils / 香精与精油

🧪 Naturally Derived Fragrance / 天然来源香精

Purpose: Fragrance

Concerns: Essential oils and natural compounds can still be sensitizing or cause contact allergies.

Notes: Provides a pleasant scent derived from natural sources rather than synthetic chemicals.

🧪 Pogostemon Cablin (Patchouli) Leaf Oil / 广藿香叶油

Purpose: Essential oil and fragrance

Concerns: Contains natural allergens that can cause contact allergy in sensitive individuals.

Notes: Offers a rich, earthy aroma and possesses antimicrobial properties.

🧪 Citrus Aurantium Dulcis (Orange) Peel Oil / 甜橙皮油

Purpose: Essential oil, fragrance, and shine enhancer

Concerns: Citrus oils can be phototoxic, though the risk is negligible in rinse-off shampoo products.

Notes: Adds a bright citrus scent and helps enhance hair shine.

📁 Thickers & Texturizers / 增稠剂与流变调节剂

🧪 Xanthan Gum / 黄原胶

Purpose: Emulsion stabilizer and thickener

Concerns: None.

Notes: A natural polysaccharide used to achieve the desired viscosity.

📁 Preservatives & pH Adjusters / 防腐剂与pH调节剂

🧪 Gluconolactone / 葡萄糖酸内酯

Purpose: Chelating agent, gentle skin conditioner, and preservative booster

Concerns: Very low irritation risk, much gentler than AHAs.

Notes: A polyhydroxy acid (PHA) that helps hydrate and preserve formulation stability.

🧪 Sodium Benzoate / 苯甲酸钠

Purpose: Preservative

Concerns: Generally recognized as safe, but can be slightly irritating in high concentrations.

Notes: Broad-spectrum preservative effective in slightly acidic formulations.

🧪 Potassium Sorbate / 山梨酸钾

Purpose: Preservative

Concerns: Mild skin sensitizer for highly sensitive individuals.

Notes: Commonly used food-grade preservative that prevents yeast and mold.

🧪 Citric Acid / 柠檬酸

Purpose: pH adjuster

Concerns: Direct eye contact may cause mild irritation.

Notes: Derived from citrus fruits, used to optimize the shampoo’s pH level for scalp health.