By Kimberly Webber

(COSMO) - It’s an age-old problem… quite literally!

Unfortunately, most women’s hair will grow gray over the years. For some of us, it happens a lot earlier than others. I’m 32 and I'm already noticing streaks of gray in my hair!

Whether you’re in your twenties or seventies, if you don’t like your grays, there’s not much you can do besides coloring. Or is there?

That’s what our team of beauty researchers and reviewers set out to find out. Are there natural ways to reverse your gray hair without dying it? It turns out there are!

Recently more brands are releasing shampoos and serums that can help you reverse signs of gray hairs without the need to color it up. There’s plenty of science showing us WHY our hair grays, and now that we know we can reverse grays, we can find the perfect products to make it happen. 

But how do you know which ones work and which are duds? Well, we’re here to help! Let's get started...

Effectiveness: 95%

Safety: 100%

Price: $

Overall: A+

This is by far our favorite choice when it comes to a simple gray hair serum that can help repair graying hair to its original color and help prevent furthering graying.. Liaison’s Gray Repair Hair Serum claims to "boost melanin production and create an ageless appearance for your hair." It’s better than any other product on the market today, loaded with essential nutrients including Ginger Root Extract and Angelica Sinensis Extract. Best of all, it was the only product on our list offering a special 50% off discount code SECRET50, which made it one of the most affordable products on the market. Just a few drops everyday can help repair and reverse signs of gray hair.

Effectiveness: 90%

Safety: 85%

Price: $$$$

Overall: B+

This serum is formulated with a blend of ingredients that have been shown to help promote hair growth and prevent graying, including arcylic, black tea extract, and biotin. It is also free of harsh chemicals and sulfates. It is a more general serum for health however, so the grays may take longer to dissapear.

Effectiveness: 89%

Safety: 85%

Price: $$$

Overall: B

This serum contains a blend of ingredients that are said to help stimulate hair growth and pigmentation, including Redensyl, Capixyl, and Procapil. It is also clinically proven to reduce the appearance of gray hair in 2.5 months. It's a little more expensive than we would have liked but still a great grab!

Effectiveness: 80%

Safety: 85%

Price: $$$

Overall: B

This serum is made with a blend of natural ingredients, including Amla Extract, Licorice Root Extract, and Saw Palmetto Extract. It is said to help prevent graying by stimulating hair growth and pigmentation. We didn't see a huge change in pigmentation, however it did slightly improve the hair color.

Effectiveness: 85%

Safety: 80%

Price: $

Overall: B+

This serum is formulated with a blend of vitamins, minerals, and amino acids that are said to help prevent graying and promote hair growth. It is also free of harsh chemicals and sulfates. While it received positive reviews, we didn't see and much gray reversal as we'd have liked. For the best results, we encourage you to check out Liaison's Gray Repair Hair Serum.

While we believe we recommended some great shampoos and serums to help reverse gray hair in women, we believe Liaison's product was the top choice. We wanted to talk further with our investigative reporter Stephanie Marianne who helped create the rankings list and how Liaison’s Gray Repair Hair Serum worked for her. Stephanie tells the story.

Personally, I never believed in the effectiveness of hair re-growth, anti-baldness anything. “Time cannot be reversed,” I used to tell my friends. Too many of them have been tricked into buying some wild oil or shampoo just to find out it’s a waste of money. So I’ve avoided it at all costs.

But then my best friend, who I trust with my life, swore by Liaison’s Gray Repair Hair Serum. She would run a few drops it into her hair everyday after showering. After a few weeks, her hair became darker and grays diminished. It was even more impressive when she showed me the before and after images throughout the weeks of using Liaison’s Gray Repair Hair Serum. 

I had always been self-conscious about my thinning hair, so I begged her to let me borrow her Gray Repair Hair Serum, but instead she gave me a secret 50% off code, SECRET50, and I ordered my own serum immediately. 

I received a package two days later and applied the Gray Repair Hair Serum for the first time that night after a shower. The application is super simple, you just add a few small drops of serum throughout your hair and rub it in down to the scalp. That’s all you need! 

I, of course, was expecting immediate results, but it actually takes a few weeks to see real results. In the meantime, I started to do my research to find out how Liaison’s Gray Repair Hair Serum works and how it differentiates itself from other gray-reversing products. 

It’s all about what CAUSES gray hair. Liaison says there’s two reasons,

1. Pigment cells in your hair called melanocytes decrease production with age, resulting in color leaving your hair

2. Stress releases the chemical NE into the follicle which rapidly kills melanocytes, ending pigment production

So Liaison aims to protect the melanocytes to help stimulate pigment production. So even if you’re stressed, you’ll still be blessed with a good head of hair. And isn’t that in of itself a great relief? 

Biota Orientalis Leaf Extract

This is your all-around bad ass ingredient to help make your hair stronger and healthier with a mix of anti-oxidants and peptides. It also is the main force in protecting your melanocytes.

Angelica Sinensis

Angelica Sinensis is amazing at pulling toxins and harmful free radicals from your hair, leaving only the healthiest follicle possible. 

Ginger Root Extract

Helps stimulate blood flow while promoting hair growth and regeneration of healthy follicles through antioxidants.

So, finally, after 4 weeks, I decided to check if I could see results… and wow! The areas of my hair that were previously gray began to darken. Plus my hair felt fuller and stronger. I was simply amazed at how good my hair felt.