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Health & precautions
- Tresse Paris
Covering Grey Hair Without Risking Your Health: The Complete Guide
2026-06-22Wanting to cover your grey hair should never mean turning a blind eye to what is actually in your colour. Yet many conventional formulas rely on ingredients flagged for their allergenic or [...]
- Tresse Paris
Does Stress Cause Grey Hair? What the Science Actually Says
2026-06-22A sleepless night, a difficult stretch of life, and suddenly you notice those first greys settling in around the temples. The reflex is instant: it must be the stress. The idea is so deeply [...]
- Tresse Paris
Hair Dye Allergy: Could 100% Plant-Based Colour Be the Answer?
2026-06-22A reaction to hair dye is, more often than not, a reaction to PPD. Here we explain what happens on the scalp, why the patch test matters every single time, and why a 100% plant-based colour with [...]
- Tresse Paris
Plant-Based Hair Colour After 50: The Gentle Choice for Mature Hair
2026-06-22After 50, your hair behaves differently and your scalp tends to react more. Here is why a 100% plant-based colour, free from ammonia and oxidant, truly respects mature hair.
- Tresse Paris
Endocrine disruptors in hair dye: what science really says
2026-05-30Do chemical hair dyes expose users to endocrine disruptors? The scientific answer, and why COSMOS Organic plant-based color is a serious alternative.
- Tresse Paris
Skin Test Before Plant-Based Hair Color: Why and How to Do It
2026-05-25Natural doesn't mean risk-free. Even a COSMOS Organic certified plant-based hair color can trigger a skin reaction in sensitive individuals. A preventive 48-hour skin test is the simplest, most [...]
- Tresse Paris
Plant-based hair dye while taking Minoxidil or Finasteride: compatibility
2026-05-21Minoxidil, Finasteride and plant-based dye: no known interaction. Simply wait 4 hours between applying Minoxidil and colouring your hair.
- Tresse Paris
Plant-based hair dye after chemotherapy: when and how to start again
2026-05-21Returning to hair colour after chemo: recommended timelines, benefits of plant-based dye on fragile hair, and why your oncologist's approval is essential.
- Tresse Paris
Plant-based hair dye and scalp psoriasis
2026-05-21Scalp psoriasis and plant-based hair dye: discover the compatibility rules and precise precautions to help avoid the Koebner phenomenon and maintain scalp health while colouring.
- Tresse Paris
Plant-based hair dye and seborrhoeic dermatitis: compatibility and precautions
2026-05-21Seborrhoeic dermatitis and hair dye: the plant-based option is better tolerated. Essential precautions for a safe application.
- Tresse Paris
Plant-based hair dye after post-partum hair loss (telogen effluvium)
2026-05-21Post-partum hair loss: can you use plant-based hair dye? Breastfeeding compatibility and tips for weakened hair after delivery.
- Tresse Paris
Plant-based hair dye and alopecia areata: what you need to know
2026-05-21Is plant-based hair dye safe with alopecia areata? Essential rules, precautions and recommendations for colouring your hair safely.
- Tresse Paris
Plant-Based Hair Colour and Menopause: Adapting Your Routine
2026-04-25Menopause changes the hair structure significantly. Here is how to adapt your plant-based hair colour routine for optimal results.
Plant-based hair color: danger or a healthy solution for your hair?
2025-10-28Many people wonder if plant-based hair color is truly safe. Here are the facts to understand the real risks and the benefits of a 100% plant-based organic color.
Plant-based hair color and pregnancy
2025-10-25During pregnancy, Tresse Paris plant-based hair color offers a natural and safe solution. Free from chemicals, it respects health while coloring and caring for the hair.
Herbal Hair Color: Safe Composition and Cosmos Organic Certification
2025-10-24The question “herbal hair color danger” often comes up. Some powders are safe, others are not. Here’s how to recognize a truly safe herbal hair color.