My hair is clearly black, why can be more and more yellow? If you've noticed that your hair is yellowing day by day over time, you're not alone. This is a very common problem, but sometimes yellowing is more obvious than in others. So, what causes hair to turn yellow, and more importantly, how can we prevent it? Read on to find out!

Black Hair Yellowing: Why And How?

Why does my hair turn yellow?

Many people experience black hair yellowing as they age. In fact, while it's natural for your hair to lose some color over time, there are a number of other factors that can contribute to yellowing. Only by fully understanding the specific causes of hair yellowing can you find ways to stop your black hair from yellowing. However, there are 5 reasons that will cause hair yellowing.

1. Sun exposure

Sun exposure

In the cold winter, do you bask in the warm sunshine every day? As we all know, solar radiation includes a wide range of energies and wavelengths. Ultraviolet and visible light radiation is the most common types of radiation we have on Earth. Ultraviolet ray radiation causes damage to hair, especially by oxidizing proteins and lipids in the hair, which can lead to yellowing.

2. Accumulation of hard water

Accumulation of hard water

Another potential cause of your yellow hair is hard water buildup. Hard water, as you know, found in most American homes, is rich in dissolved calcium, magnesium, and other minerals.
When you wash your hair in hard water, these minerals build up, which in addition to leaving your hair dry, tangled, and brittle, can also cause it to turn yellow.

3. Heated styling tools

Heated styling tools

Pay attention to your styling tools! Curling irons, hair dryers, and electric irons can all cause black hair to turn yellow. The heat from these styling tools can damage the protein of your hair and keratin fibers. In addition, the heat also strips hair of its natural oils and moisture, making it more vulnerable to damage.

4. Environmental pollution

Environmental pollution

If you live in a big city, environmental pollution is a problem that's hard to avoid. Air pollution and dust can accumulate in your hair, which is affected by potentially harsh environmental conditions, causing them to take on a yellow or green color. In addition, the smoke will definitely cause your hair to turn yellow.

5. Side effects of drugs

Side effects of drugs

Some medications can greatly affect the health and appearance of your hair. In addition to causing your hair to change from black to yellow, medications may also cause changes in hair follicles.

How to prevent your black hair from turning yellow?

The yellowing black hair can be worrying, but now you know what causes the yellow hair. There are several methods you can use to prevent unwanted color changes, and we'll cover them below. Most of these are just part of a healthy hair care regimen that is good for anyone who tries it!

1. Protect your hair from the environment

While air pollution is inevitable to some extent, there are steps you can take to prevent environmental damage to your hair. So if you spend a lot of time in a dusty or polluted environment, make sure you wash your hair regularly. This will get rid of toxins before they have a chance to damage your hair strands.

2. Use sunscreen

It's important to use sunscreen during the day because sunlight is a major cause of hair yellowing. The most common cause of hair yellowing is exposure to sunlight. On hot sunny days, use a hat, cape, umbrella, or scarf to protect your hair from the sun. This will help prevent light damage to the hair.

3. Use a shower filter

Water running from the shower head can also cause hair to turn yellow, as it can contain high levels of pollutants. To avoid this, you can install a shower filter, which will help remove dirt from the water before it comes into contact with your hair.

4. Use a special shampoo

Blue and purple shampoos and conditioners offer a mild alternative to harsh chemical dyes. They contain pigments that settle in your hair strands and counteract the yellow undertones of blonde hair. While it won't result in dramatic color changes, it will harmonize your blonde look.

5. Apply heat protectant

If you use any kind of thermal styling tool on your hair, a heat protectant is a must, as it will help prevent heat damage. In addition, keep the electric iron or dryer to a minimum temperature, and if you can, get rid of the dryer and hot iron altogether.


All in all, there are various reasons why your natural hue changes from black to yellow. While it can occasionally signal an underlying condition, yellow hair is usually nothing to worry about.