You know what's cool? When you use a beauty product and it *actually* does what it says it'll do. How good is that?! Rare, but delightful.

Watch: Mamamia roadtest cult viral beauty products to see if they actually work. Post continues below.

To help cut out all the noise (and there is A LOT of fluff out there), we asked a bunch of women for the one product they've used that's noticeably changed their appearance.

Get those bank cards ready, friends.

Eleanor - Kiehl's Ultra Facial Cream, $51.

"The only face moisturiser I've actually used that I've seen has made a visible difference to my skin. All the others I've ever used have made my skin feel hydrated, but this is the only one that I have noticed leaves my skin GLOWING. I've gotten compliments on my skin when just wearing this... and that never used to happen!"

Listen: Been trying to find a good moisturiser for zonks? Same. Check out this episode of You Beauty, where Leigh and Kelly dish out their faves. Post continues below.

Jessie - Beaute Pacifique Super 3 Booster Night Cream, $104.

"This. And it's all Leigh Campbell's fault. And it's too expensive. And I wish it didn't work, but it does. It's anti-ageing and visibly reduces fine lines and pigmentation."

Polly - Alpha-H Liquid Gold, $60.

"I use it at night and wake up every morning with new skin."

Georgia - Elizabeth Arden Eight Hour Cream Skin Protectant Original, $28.

"Nothing else works this well on my dry/flaky lips!"

Sarah - Aduro Personal LED Mask, $499.

"My pigmentation has reduced and my skin is brighter."

Katie - Kiehl's Lip Balm #1, $16.

"This s**t is bliss. It's the only lip balm that has ever properly nourished my lips for longer than 30 seconds. This may be slightly my fault as a I have a tendency to subconsciously eat off my own lip balm - but this one still delivers the goods even when that happens! How? Probably magic/Kiehl's scientists being utter geniuses. Oh also, it has to be the cranberry one. It's like (British) Christmas Day on your face."

Jessica - NeoStrata Resurface Lotion Plus, $63.99.

"I use this to reduce the appearance of Keratosis Pilaris."

Anisha - NIOD Fractionated Eye Contour Concentrate, $100.

"This definitely reduces the fine lines under my eyes (I'm on my first bottle) - my concealer has stopped creasing."

Kirrily - Dr Dennis Gross Spectralite Faceware Pro, $696.

"I am 45 and never ever spent this kind of money on face care - but for a variety of reasons decided to give it a go. There has absolutely been a difference in the appearance of my skin. I have used it every night and my skin has tightened and my hormonal red chin has improved. My husband has commented on what a change it has brought. Did not regret this purchase at all! I am also using it on my twins' faces for pimples etc. (There are three different settings)."

Emma - The Ordinary Niacinamide + Zinc, $9.90.

"The first real change I noticed in my skin was when I started using The Ordinary Niacinamide + Zinc in a 'basic' skin care routine - I saw some really quick results."

Tam - PeppyCo LED Light Therapy Mask v2, $179.

"When I'm really consistent with using this LED Mask, I find my skin looks clearer and more glowy. It's also a bit more affordable than the other options out there!"

Kelly - EyEnvy Eyelash & Eyebrow Conditioner.

"Everyone needs EyEnvy in their life!"

Emmeline - Andalou Naturals Deep Wrinkle Dermal Filler, $29.99.

"I started using this as soon as I started getting lines on my forehead and it worked immediately. It's natural and fairly cheap, too."

Renny - Imbibe Miracle Collagen, $40.

"I changed nothing else and my skin is way plumper and my eczema is almost non-existent."

Isobel - Emma Lewisham Supernatural Collagen Peptide 72-Hour Crème, $135.

"I've noticed a HUGE difference in my fine lines around my eyes and general plumpness of my skin since I started using this every night. I'd previously been using all Rationale and loved the night cream, but moved to this while I figured out my next steps - and I'm really loving it!"

Leticia - LightStim For Acne: LED Light Therapy, $340.

"I love the LightStim handheld LED device. My skin looks so good when I use this consistently."

Jenny - Revolution Skincare Extra 15% Niacinamide Serum, $20.

"This has got rid of my sun spots and evened out my skin, while also minimising my pores. I’m 42 and my skin is looking great. You can get it in Priceline and it's not expensive. You have to use it morning and night for about six weeks before you see a difference. I’ve been using it for six months now and the results are great."

Cherie - Nioxin 3D System 2 Cleanser Shampoo and Conditioner, $44.

"If you're losing stupid amounts of hair, this STOPS it."

Amena -