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Tweak your existing beauty with our cult-like best sellers, designed with you in mind! Slick those brows and flyaways, strengthen your lashes, and de-puff your under eyes. 

The perfect addition to assist you on your wedding or giving as a bridal gift.  




*Colour of masks may slightly differ to image

Trio - save $14


Our Story


Tweak’s mission is to create products not only driven by results, but that make everyone feel amazing and ready to conquer the day. All you need is to ‘Tweak’ your self-care routine in ways that benefit YOU.  We’re not in the business of changing you, we’re here to enhance your existing beauty.

A message from Natalie (Founder)

Tweak Cosmetica was created in my Adelaide studio. Working as a lash tech, I saw a gap in the beauty market for a lash growth serum that actually worked. All of my clients were constantly asking for my recommendation. The problem being the oversaturated lash growth serum market delivered products that were not results focused so I didn't feel comfortable recommending. Enter TWEAK.


Free Shipping

Free express shipping on orders over $75 within Australia.

$5.00 flat rate standard Australian shipping.

$15.00 international standard shipping.


Your order will be posted out within 2 business days of your order confirmation. 

Get in touch

Have questions? Get in touch with us at any time!

Money back guarantee (Lash Serum)

We believe in our product

That is why we will back our market-leading innovative lash growth serum with a money back guarantee.

Results speak for themselves

If you do not see any change in your lashes after a full 16 weeks of daily use, we will refund you (minus postage).

Refer to the T&C's here

What are you waiting for?

Thousands of Australian women have seen dramatic length and thickness improvements. See verified reviews here.



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