Beauty fans longing for fuller, healthier, shinier hair have been rushing to buy a that might just get you closer to luscious locks, but it's worth acting fast if you want to get your hands on a bottle.

The , from £29 for 30ml, sold out within four days when it first launched last year. It's clinically proven to improve hair growth and density, promising to reduce hair loss by up to 95%.

The is powered by pisum sativum pea sprout extract and turmeric, which trichologist and UKLASH ambassador Hannah Gaboardi claims "work harmoniously to revitalise the scalp and create an optimum environment for hair growth during tumultuous periods."

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Meanwhile, the is a best-seller that sells one every 30 seconds, costing £34 for a 30ml bottle. A cheaper option is the , which is priced at £25 for 100ml at Boots.

According to its , three-to-five drops of UKLASH's Hair Growth Serum need to be applied every day to a damp or dry, clean scalp. Tests carried out by the brand showed improvements in hair growth, strength and breakage in as little as three months.

Over 1,200 shoppers have reviewed the Hair Growth Serum so far, earning it an overall rating of 4.4 out of five. One five-star comment reads: "Started using this about 6 months ago possibly longer as my hair had started falling out alot hitting menopause, this little product has been a for me, highly recommend, my hair is growing quickly and thicker, I already use the lash serum which is also 5*."

A second fan said: "I purchased this for my mum who has female pattern baldness and we have both noticed lots of new hair growth, this is amazing as she’s had two hair transplants in the past, but with this serum it’s and she’s still on the first bottle! She’s so happy with the results it really is like a miracle!"

Someone else added: "It does what it says on the packet. Makes it grow faster and than without it."

One customer, however, only gave the UKLASH product a one-star rating. Their review reads: "I was really hopeful that this would work after seeing all the good reviews, but after using for four months I've seen no sign of anymore hair growth around my temples and parting, even after applying every day. Very sad that that this product didn't work for me."

You can purchase a 30ml bottle of the . More hair growth products can be found at and .