The term “natural shampoo” is based on specific criteria. In the cosmetics industry, the ISO 16128 standard is commonly used to define and calculate the proportion of ingredients of natural origin in a formula.
A natural shampoo is generally composed mostly of ingredients derived from plants, minerals, or fermentation, with a limited level of processing.
Unlike conventional shampoos, these formulas often exclude certain controversial ingredients such as:
- silicones
- harsh sulfates (SLS / SLES)
- microplastics
- certain synthetic preservatives
The goal is not simply to replace ingredients, but to offer a formula that is more respectful of the scalp and the natural balance of the hair.
Conventional shampoo vs natural shampoo: what are the differences?
Cleansing agents
Conventional shampoos often use strong sulfates. They create a rich lather but can be harsh on the scalp. Natural shampoos favor gentler cleansing agents, often plant-based (for example, derived from coconut), which cleanse effectively without stripping.
Silicones
Silicones found in many conventional shampoos provide an immediate feeling of softness and shine by coating the hair.
However, they can also:
- weigh down the hair fiber
- prevent certain active ingredients from penetrating
- suffocate the scalp over time
Natural shampoos, on the other hand, are generally silicone-free, allowing the hair to regain its natural texture.
Results : A conventional shampoo often works immediately, leaving hair feeling soft from the very first use. A natural shampoo works more gradually, but aims for a long-term balance of both the scalp and the hair.
Why your hair may react at first
When switching to a natural shampoo, a transition phase is common. After years of using silicones or harsh sulfates, your hair and scalp need time to adjust.
For a few weeks, you may notice:
- heavier-feeling hair
- a different type of lather
- a scalp gradually rebalancing its sebum production
This phase typically lasts 2 to 4 weeks. It’s simply the time needed for your scalp to regain its natural balance.
How to choose the right natural shampoo
The most important factor is not your hair type, but the condition of your scalp.
Oily scalp
An oily scalp needs to be purified without being stripped. Ingredients like clays (rhassoul, kaolin) help absorb excess sebum while respecting the scalp’s natural balance.
Discover our Purifying Rhassoul Shampoo
Dull or lifeless hair
Dull hair often needs strengthening and revitalizing. Antioxidant-rich ingredients like goji berry or acerola help restore shine and radiance.
Discover our Revitalizing Shampoo with Goji Berry & Acerola
Dry, curly, or sensitized hair
Dry hair needs nourishment and protection without being weighed down. Ingredients like argan oil or oat provide softness and flexibility.
Discover our Softening Shampoo with Organic Argan & Oat
Irritated scalp & dandruff
An irritated scalp with dandruff needs to be treated gently, without disrupting its balance. Active ingredients like piroctone olamine help target the microorganisms responsible for dandruff, while zinc gluconate helps regulate sebum and purify the scalp.
Soothing ingredients such as erythritol and oat help calm irritation, hydrate, and reduce discomfort.
Discover our Anti-Dandruff Shampoo
A different approach to shampoo
At Less is More, we chose a powder format to get back to essentials:
- no water transported
- concentrated ingredients
- less packaging
- formulas made with 99% natural-origin ingredients
When mixed with water, the powder transforms into a liquid shampoo. The active ingredients are activated, and the formula is ready to use in just a few minutes.
The result: a sensory, effective, and more responsible experience.
Go further: our complete guide
Switching to natural shampoo can raise many questions.
That’s why we created a complete guide to support you through this transition.
You’ll find everything you need to know: the differences between natural and conventional shampoos, how to choose the right format, how to identify the best shampoo for your scalp, and tips to successfully navigate the transition phase.
And a surprise awaits inside to help you take the first step.




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