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With summer on the horizon, you wouldn't be alone if you're considering some sort of new diet or fitness regime in order to tone up for the warmer weather.

But it needn't be all deprivation and calorie counting.

Instead, all you need is the help of one Aussie brand's best-selling Collagen Glow Shakes ($79) in order to shift the stubborn kilos and look and feel your best.

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Melbourne-born brand The Collagen Co has made a name for itself over the past few years for developing delicious meal replacement shakes that help Aussies lose weight, tone up and stay fuller for longer.

The latest success story is Sydney-based woman Natalie, who lost a whopping 10 kilograms in just five months by using The Collagen Co's Glow Shakes.

"I lost 10 kilos in the first five months using the Glow Shakes," Natalie told Best Picks, proudly showing off her new physique.

Packed with 29g of protein per serving, the ridiculously satiating Glow Shakes shield you from those feels-like-my-stomach-is-eating-itself attacks between meals.

The 764g powders also contain 17.5g of hydrolysed collagen peptides to promote skin, hair, nail and joint health for a full-body glow you can see and feel.

There are a number of flavours available on The Collagen Co's website, including Choc Mint, Chocolate, Coffee, Banana, Salted Caramel and Strawberry Milkshake.

To celebrate Natalie's success, the team from The Collagen Co. flew to Sydney and visited Natalie at her home.

To show her what 10kg of weight loss really looks like, they brought along ten 1kg bags of flour -- the exact amount she had shed.

Natalie held the heavy stack of flour bags in her arms, instantly feeling the weight that used to be part of her body.

It was a striking, tangible demonstration of just how much she had achieved.

And Natalie isn't the only success story.

Hundreds of men and women have shared before and after photos showcasing their Collagen Co journeys.

There are over 15,000 reviews on The Collagen Co's website and the $79 Collagen Shakes have been described as everything from "liquid gold" to "solid gold stuff".

"Down two dress sizes!" writes one happy shopper.

"I have so much more confidence. I can't wait to keep going strong and hitting my goals."

Another adds: "Less bloating, clearer skin, more energy... and I'm down three dress sizes!

"I honestly can't believe the difference. I'm feeling so much more confident in my skin."

Many who have tried them also say they don't feel hungry, as is often the case with other meal replacement options.

For more information and to browse the success stories from The Collagen Co for yourself, please head here now.