This popular $10 serum uses caffeine to help thicken and grow your beard

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When it comes to growing a nice long beard, not every man is so privileged. While some men can grow a beard quickly, others might be stuck with peach fuzz for weeks. And if you're one of the ones who struggle, you now can get some help. 

While this Wild Willies Beard Growth Serum can't change your genetics, it can help grow facial hair stronger, faster and healthier. How? By using a unique blend of caffeine and biotin. 

According to the product description, the caffeine works like a fertilizer to stimulate your hair follicles. It specifically targets a hormone called ATP, which is an "essential source of energy" that maintains hair growth. And then biotin is added to help thicken your hair and make it grow stronger and healthier.

Shop: Wild Willies Beard Boost Serum, $9.86 (Orig. $13.93)

Apart from the caffeine and biotin, the serum contains 13 natural ingredients and organic essential oils. Additionally, the serum doesn't contain any chemicals, preservatives, fragrances or colorants. 

Although there aren't many reviews for the product, it is listed as one of the top three bestselling beard conditioners and oils on Amazon. And for the majority of the buyers who have tried it, they have nothing but great things to say about it.

One reviewer pointed out how effective the serum was in growing his facial hair.

"Scent is neutral/smells kind of good, has like a beard oil feel, helps pat beard down. Does it help grow? Yes actually have only used for less than a month and can see results. However I bought this to fill in small patches on my cheeks, my beard has been slowly growing in already without this product, this does what it says it does BOOST."

Another buyer raved about how the serum positively affected the texture of their beard.

"Beard appears to be a lot more tame almost like a frizz control would be for your actual hair this definitely helps keep the beard more tame/down and not so puffy. It also helps make the beard hair softer and not so scruffy feeling. Hard to tell on how much it is actually helping beard growth as I haven't noticed much of a different in hair growth but overall as a beard conditioner it seems to do well for that."

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