Get the grey coverage you’ve been dreaming of.

Going grey is a natural part of life. While some women choose to embrace their silver, others prefer to live life in full color by covering those greys. In this article, you'll learn what causes grey hair, how to care for it, and the best ways to color it. We’ve gathered plenty of expert tips for you, including how to choose the absolute best shades for seamless grey coverage.

article-duration
4 min read
L'Oréal Professionnel Team
05-08-2026

What causes grey hair?

Let’s begin by saying that going grey is natural. Everyone’s hair turns grey (or white) at some point. For many, this process begins in your 20s or 30s, for some, it can happen much later. Hair begins to turn grey when hair follicles stop producing melanin, which is what gives your hair its color. Many factors come together to determine when your hair will begin turning grey, including family history, health conditions, and lifestyle.

Does stress cause grey hair?

In a word, yes. Stress can speed up visible signs of ageing, like going grey. Stress causes the release of a hormone called norepinephrine which can cause the melanin-producing cells to move out of your hair follicles, which, researchers say, plays into your hair turning grey.

How do you prevent grey hair?

We can't quite prevent hair from going grey, in the same way that we can't stop time. There aren't any medical treatments that bring the color back to your hair. That said, if an underlying health condition, like a vitamin deficiency, is responsible for your changing hair color, a doctor or dermatologist might be able to help. Remember, going grey is totally normal. However, if you are looking for the best color to cover those greys, we've got you covered below.

There are also some lifestyle changes you can adopt to help slow the greying process. Dermatologists recommend maintaining a healthy lifestyle, which includes having a balanced diet and getting adequate sleep. They also recommend not smoking, protecting your hair and skin from the sun, and trying to manage stress.

Expert tips to cover grey hair.

Now that you have options, where do you begin? You want a professional-grade hair color so you can cover those greys with ease and precision. When it comes to the best color for grey coverage, Majirel by L’Oréal Professionnel achieves rich, even color from root to tip with up to 100% grey coverage. This iconic, caring formula dates back to 1978, ensuring reliable results every time. It provides a pleasant, in-salon coloring experience without compromising on long-lasting vibrancy. Now featuring a vegan formula, its new caring-agent complex provides three times more care—leaving hair noticeably smoother, more conditioned, and easier to manage. Plus, the improved creamy texture allows for a seamless, flawless application.

For grey coverage, also consider iNOA, the most innovative permanent color powered by oil and created in 2009. It’s ammonia free and enables a totally luxurious in-salon experience.

Now, if you don’t want to have grey hair, you don’t have to.

Ash brown

 

A lighter ash brown might not provide full, robust coverage, but it can be a light way to mask the grey.

 

Cool blonde

For those with lighter hair (or those who have already gone full grey), a cool blonde shade is the way to go, blending effortlessly with your grey.

Your questions & our answers about the best color to dye hair to cover grey. What causes grey hair?

  • Does stress cause grey hair?

    Yes. Stress can speed up visible signs of ageing, like going grey.
  • How do you prevent grey hair?

    You can't quite prevent going grey, but there are some lifestyle recommendations that may help slow the process.
  • What is the best color to dye hair to cover grey?

    Some of the best colors to cover grey hair include: brilliant brown, ash brown, or cool blonde.