Thinning hair? These products are amazing — and they're all on sale for Prime Day (today only!)

Wisdom comes with age but unfortunately, so do other things...like hair loss. There are a number of factors that can disrupt healthy hair growth but we want to focus on solutions here: the shampoos, topical treatments, and internal supplements designed to help combat hair thinning. Many of the best are marked down big-time today only, thanks to Amazon's Prime Day Early Access sale.

This event is a great opportunity to stock up on essentials or try a new product you're curious about, because the deals are pretty spectacular. And while you're at it, you might consider getting a jump on holiday shopping. You need to be an Amazon Prime member to take advantage of these Prime Day Early Access discounts. So if you're not, go ahead and sign up for a free trial, which also gives you complimentary shipping. Then scroll to check out the best of the best products for thinning hair, at prices you won't believe.

The folks behind the Nioxin system are highly regarded by professional stylists and Amazon shoppers alike. The products in this kit work to reduce hair loss, strengthen hair, refresh the scalp and deliver healthy shine. Nearly 20,000 reviewers have blessed it with a five-star rating. Why? Because it really works: "I have no words for how much I love this product.... My hair no longer breaks, I have little to no hair loss, and my hair is fuller and healthier than it's ever been."

Viviscal is basically synonymous with hair growth now. Nearly 4,000 shoppers have penned five-star tributes to its effectiveness. It's typically on the pricier side, so we were thrilled to see it on sale for Prime Day. While the price tag for this supplement may (still) seem steep, it's worth noting that you're getting a three-month supply. People truly swear by them to help their hair grow in full and strong. "When I started to notice major hair loss, I went to my derm and asked her to tell me what works vs. junk that just takes your $$$. She gave me a list of proven products to grow hair. Viviscal was on the list," one happy shopper said. "I am happy to report I have baby hairs everywhere!!!! I’m so happy!!! It can be so devastating for a person to lose their hair, but I’m here to report we have options and hope. We don’t have to lie down and take it! We can proactively fight and do everything in our power to look the way we want to look."

“This shampoo has changed my life,” raved a happy customer. “My hair was falling out at a rate of 100-plus hairs in the shower, and after about a month or two of use (it's been about four months now), I only lose 10- to-30-ish.... Yay! My hairdresser said my hair looked thick. Also smells amazing and makes your hair soft.”

If you deal with hair loss from chemical damage, Olaplex is another way you can combat breakage. Professional stylists and nearly 86,000 Amazon shoppers alike are smitten with this treatment. Similar to its in-salon counterparts, the Olaplex Hair Perfector treatment goes beyond a traditional conditioning treatment and works to repair the broken bonds in your hair. "It really is a miracle," shared one reviewer. "It's worth every penny."

This weekly treatment, too, was formulated to address the underlying causes of sudden, temporary thinning hair. Infused with natural key ingredients, this potent serum helps to preserve the scalp’s natural balance, stimulate the anagen phase (the time at which follicles actively begin to grow) and strengthen those locks.

One happy customer said it's fabulous for sudden hair loss. "I went to a dermatologist who diagnosed me with a sudden hair loss condition called telogen effluvium, which is caused by a “shock” to the system (in my case, a high fever)," they said. "I wanted to treat my scalp and promote hair growth, so I started using this product, and it worked! I actually now have slightly thicker hair than I ever had.... This product very much helped with the overall regrowth. Highly recommend."

If you want the look of thicker, fuller hair, look no further. R+Co's Dallas Thickening Shampoo, formulated with biotin, plumps up your strands and gives it more volume. Total bonus: It smells amazing. Nearly 3,000 people posted a five-star rating for this thickening shampoo. One reviewer said it's the best shampoo for their thinning curling hair: "I was introduced to this shampoo by my friend and hair stylist.... The consistency is just the right balance between free-flowing and a smooth, almost-lotion texture. I find the shampoo to be a great bargain in that the very smallest amount from the squeeze bottle is sufficient to work up a rich lather. I can use even less when I do a second application. With a great haircut, Florida humidity, and this shampoo, my hair is so happy it's started curling on its own!"

Did you hear that Prime Day is happening again? Amazon’s Prime Early Access Sale ends today and you need to be an Amazon Prime member to take advantage of the deals. Here's how you can sign up for a free trial, which also gives you complimentary shipping. See all of our Prime Early Access Sale coverage here and shop the early Prime Day deals here.

The reviews quoted above reflect the most recent versions at the time of publication.

See all of our Prime Early Access Sale coverage, here. Shop the top early Prime Day deals on Yahoo Life, get the best Prime Day tech advice on Engadget, learn about Prime Day trends on In the Know, and check out Prime Day car deals on Autoblog.