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Natural vs Synthetic Hair Extensions: what you must know before buying

Natural vs Synthetic Hair Extensions: what you must know before buying

Nov 26, 2025

Joana Prata

Discover the difference between human and synthetic hair extensions. Learn why natural hair extensions are a smarter, healthier investment for your hair. 

Human Hair vs. Synthetic Extensions: What's the Difference?

When you're considering hair extensions, understanding what you're buying is essential. Not all "human hair" is created equal, and choosing the right type can significantly impact your hair's health and appearance.

What Are Human Hair Extensions?

Human hair extensions are crafted from real, ethically sourced hair, with the cuticles intact and aligned. This ensures natural movement, authenticity, and softness. At BEHTA LISBON, we prioritise transparency: every strand reflects genuine quality, with cuticles meticulously aligned to prevent tangling.

What Are Synthetic Extensions?

Synthetic extensions are made from plastic-based fibres and often treated with chemicals to mimic the look of real hair. They lack natural texture, limit your styling options (especially with heat), and typically don't last as long or look as realistic.

A study published in the US National Library of Medicine, National Institutes of Health, found that synthetic hair extensions can cause irritant contact dermatitis.

Read the study here

How to Tell If It’s Truly Human Hair

Even among "human hair" extensions, there are significant differences. If the price seems too good to be true, it might not be 100% human hair - it could be mixed with synthetic fibres.

Genuine human hair is more expensive due to its quality and exclusivity. Premium, untreated human hair can cost significantly more than synthetic options. Industry reports indicate high-quality hair can cost up to US$5 (~4,5 euros) per gram for premium-grade extensions.

Why Natural Extensions Are a Smarter Investment

  • Durability & Realism: Human hair lasts longer, styles naturally, and doesn't have a "plastic" look.
  • Health & Safety: Free from harsh chemical processing, making them gentler on your scalp and hair.
  • Authenticity: You're choosing hair that looks, feels, and moves like your own.

At BEHTA LISBON we only work with hair extensions that feel real, last longer, and protect your hair health.

The choice is clear: natural always wins.