Short Answer: Yes, of course it can be.
Long Answer: Yes, but this isn't an easy answer because with relax hair there are a lot of factors to take into consideration such as personal lifestyle, climate, etc.
Let's start out by discussing what a relaxer does to your hair. A relaxer is a cream or lotion designed to break down the bonds in our hair, which make it curl/coil, to achieve a straighter texture.
There are three different types of relaxers; thio relaxers, lye relaxers, and no-Lye relaxers. The most common relaxer used is the no-lye relaxer, because it is calcium hydroxide-based and has a lower PH Level ( a scale used to specify the acidity or basicity of a water solution ) than relaxers containing lye. No-lye relaxers are also less harsh on the scalp and are the easiest to find in your local beauty supply store.
When relaxers break down the hair bonds, the hair will become a straighter texture. Unfortunately, this comes with a price. Because the bonds that break are the same bonds that strengthen your hair, it leaves the hair in a weakened state and is more prone to issues such as breakage and dryness. These issues are reasons why people believe all relaxed hair is unhealthy, but it doesn't have to be this way.
Items To Use On A Wash Day:
Shampoos are made to strip oils from the hair, and relaxed hair needs all the oils and moisture it can hold. A great alternative to shampoo is a co-wash. They are great for cleansing your hair, as it cleans without stripping any oils keeping the relaxed hair moisturized. A great co-wash is Design Essentials Natural Almond & Avocado Nourishing Co-Wash.
A hair mask is also a great product to add to your hair care regime. It further promotes hydration and strengthens the hair. Fluff recommends using Design Essentials' Natural Coconut and Monoi Deep Moisture Masque.
Using a thick leave-in treatment such as Design Essentials' Coconut and Monoi Deep Moisture Milk Souffle hydrates the hair leaving it soft with a shine.
Always follow up a shampoo with oil or serum of your choice to seal in the moisture. Be sure to touch up the relaxed hair with oil to maintain moisture.
Other Hair Care Tips:
The hair is already stretched, so the use of heat styling should be kept at a minimum or only when necessary. Use a wide tooth comb rather than a comb with smaller, closer teeth to detangle to eliminate stress in the hair. Adding excessive tension to the hair strands will cause in hair breakage.
The bottom line is, if you are not conditioning and taking care of relaxed hair it will be unhealthy, but that is the same with any other hair texture. To have healthy relaxed hair, it is necessary to stay on top of maintenance and proper hair care. Indique ID is a great resource to find the perfect products for your hair no matter if you are natural or relaxed.