Soapbox Biotin Shampoo for Thin, Fine, Thinning Hair — 1 L Pump, Volumizing & Repairing with Vegan Collagen

Soapbox Biotin Shampoo is a 1-liter pump bottle of volumizing, biotin-enriched shampoo formulated to help strengthen, add body, and restore moisture for thin, fine, or thinning hair.

This concentrated shampoo blends biotin with vegan collagen and a superfruit complex to help hair look fuller and feel healthier while remaining color-safe and free from harsh sulfates and silicones. Designed for everyday use, the formula pairs well with a biotin conditioner and contains coconut-derived ingredients and plum oil to hydrate strands without weighing them down. Soapbox also emphasizes ethical production—its vegan, cruelty-free formula supports charitable donations tied to each purchase.

How will this shampoo affect limp or flat hair?

This shampoo targets volume by combining biotin and vegan collagen to coat and fortify strands, creating a fuller-looking silhouette at the root and along the shaft. Lightweight emollients restore moisture balance so hair gains lift without greasy residue.

• Biotin and vegan collagen for thicker-feeling hair
• Light, non-greasy moisturizers to preserve root lift
• Color-safe formula keeps dyed hair vibrant while adding body

Will Soapbox Biotin Shampoo repair damage and dryness?

The formula includes coconut-derived oils and plum oil that help replenish lipids and smooth cuticles, improving manageability and minimizing breakage from dryness. Regular use supports improved texture and resilience while avoiding harsh sulfates that can strip moisture.

• Coconut-rich ingredients bind to hair proteins to help seal moisture
• Plum oil adds hydration and softness to damaged ends
• Sulfate- and silicone-free to protect hair’s natural oils

How does this shampoo fit into a hair-thinning routine?

Use it as the cleansing step to remove buildup and create a foundation for growth-focused products like a biotin conditioner or topical treatments. The shampoo’s nutrients support stronger strands, which can reduce breakage that contributes to the appearance of thinning.

• Daily-friendly pump format for consistent use
• Pairs with biotin conditioner for enhanced strengthening
• Gentle enough for all hair types and color-treated hair

What are the key practical features of the 1 L pump bottle?

The one-liter dispenser provides salon-style capacity and an easy-to-use pump for measured dispensing and less waste. The larger size is economical for regular users and households seeking longer-lasting supply while maintaining product freshness.

• 33.8 oz pump bottle for convenient, controlled dispensing
• Excellent value and reduced packaging waste over small bottles
• Travel- or refill-friendly design for home routines

Who is this for: Soapbox Biotin Shampoo is intended for anyone with fine, limp, dry, or thinning hair who wants a vegan, cruelty-free option that supports fuller-looking hair and improved manageability. It’s suitable for color-treated and chemically processed hair, and for shoppers who prefer ethically minded brands with a charitable mission.

Ingredients

Water (Aqua), Cocamidopropyl Betaine, Sodium C14-16 Olefin Sulfonate, Glycerin, Sodium Chloride, Biotin (Vitamin B7), Prunus Domestica (Plum) Seed Oil, Sambucus (Elderberry) Nigra Seed Oil, Persea Gratissima (Avocado) Fruit Extract, Carica Papaya (Papaya) Fruit Extract, Musa Sapientum (Banana) Fruit Extract, *Hydrolyzed Soy Protein, *Rice Amino Acids, *Proline, *Hydrolyzed Adansonia Digitata Extract, Butyrospermum Parkii (Shea) Butter, Aloe Barbadensis (Aloe Vera) Leaf Juice, Ascorbic Acid (Vitamin C), Panthenol (Vitamin B5), Pantothenic Acid, Tocopheryl Acetate (Vitamin E), Folic Acid (Vitamin B9), Sodium Lauryl Sulfoacetate, Cetrimonium Chloride, Benzyl Alcohol, Disodium Laureth Sulfosuccinate, Guar Hydroxypropyltrimonium Chloride, Citric Acid, Dehydroacetic Acid, Linalool, Hexyl Cinnamal, Limonene, Propylene Glycol, Fragrance (Parfum). * Bioidentical Vegan Collagen.