This Gentle Brow & Lash Serum Delivers Amazing Results — & It Has The Before & After Pictures To Prove It

Bushy eyebrows and long lashes are more popular than ever and as a result, the market has been flooded with serums promising to promote growth and thickness. But if you have sensitive skin or eyes or are cautious about the products you use on your skin, you might feel hesitant to take a chance on a buzzy new product — especially when key ingredients commonly found in popular lash serums have been banned in some countries due to potential negative side effects. This is where twenty/twenty beauty’s Get Growing Lash & Brow Serum comes in — it boasts a simple, ophthalmologist-developed formula with just three ingredients, and the results are stunning.

Why twenty/twenty beauty?

twenty/twenty beauty’s founder, Dr. Diane Hilal-Campo is a Columbia-trained, board-certified ophthalmologist with 25 years of experience. In that time, she treated many patients experiencing painful eye conditions that had been caused by irritating makeup and beauty treatments, and it spurred her to develop her own range of eye-friendly formulas.

How Does The Get Growing Lash & Brow Serum Work?

This best-selling serum helps to promote the appearance of longer, fuller-looking eyelashes and brows within as little as three months of consistent use. Packaged in a hygienic pump bottle, the serum is easy to incorporate into your nightly routine. Simply use a clean finger or brush to distribute a single pump’s worth onto clean, dry lashes along the upper and lower lids (at the lash line). For brows, you’ll follow a similar approach, using one pump of formula to spread across both eyebrows at night.

What Are Get Growing Lash & Brow Serum’s Ingredients?

The formula has three simple, plant-based ingredients: argan oil, coconut oil, and the star ingredient, castor oil. According to twenty/twenty’s founder Dr. Diane Hilal-Campo, she had been using castor oil on dry eye patients for years to help soothe pain and saw her patients develop longer, thicker eyelashes as a result.

But just as important as what ingredients are used in the serum is what ingredients are not. twenty/twenty’s brow and lash serum formula is free from parabens, silicones, fragrances, and phthalates — ingredients that some people prefer to avoid in skin and hair care products because they have been associated with irritation or other side effects. But most notably, twenty/twenty’s eyelash serum doesn’t have prostaglandin, a key ingredient found in many eyelash serums and one that’s suspected of having particularly harmful side effects including eye pain and irritation, hyperpigmentation, and darkening of the iris. While FDA has approved the use of prostaglandin in cosmetics in the US, some countries, including Canada, have banned them.

According to the brand, the formula’s simplicity makes it suitable for people with sensitive skin and eyes. But, while this serum was formulated to be gentle, it's still a good idea to check with a doctor before trying a new product on your eyes if you’re prone to allergies or have other existing concerns.

What are reviewers saying about Get Growing Lash & Brow Serum?

The predominantly five-star reviews of twenty/twenty beauty’s Get Growing Lash & Brow Serum find users commenting on how gentle and nourishing the serum was on their lashes and brows. Many also found that the formula helped soothe and hydrate their normally dry eyes.

All in all, the reviews for the serum are notably positive, some even bordering on ecstatic:

“Made from simple ingredients that I can pronounce and that I'm knowledgeable about, had me excited. The serum was lightweight and EXTREMELY gentle on my eyes!” — Erin.

“Well, this is MY PRODUCT. Not only does this serum check off all of the boxes, my lash stylist cannot get over how healthy my lashes look in just 3 weeks.” — Charles.

“Before using this serum, my lashes were thinning and kind of fragile. This serum has had a positive impact on the volume, length and density of my lashes.” — Holly.

“After four weeks of use, I noticed my eyebrows and eyelashes appear thicker and definitely healthier. Being in my 40's, I was surprised at how easily this serum corrected my issues.” — Candy.

“I love that it's hypoallergenic (since it's going around my eyes), cruelty-free, and is made with CLEAN ingredients. I feel more confident about how I look and have even ditched the eyebrow pencil and mascara from my routine!”—N Paul.

What Else Does twenty/twenty beauty Offer?

Beyond the Get Growing Lash & Brow Serum, twenty/twenty beauty offers a handful of makeup and skin care products that were formulated by an ophthalmologist to work for even sensitive eyes.

The Clean Sweep Mascara features hyaluronic acid, vitamin E, and biotin, for a buildable formula that not only adds immediate length but also promotes stronger and longer lashes over time. It’s free of parabens, carbon black, and coal tar dyes.

One reviewer wrote: “I have incredibly sensitive eyes. I have purchased every "hypoallergenic" or "sensitive" mascara out there. Without fail, I end up with pink eye. I purchased this product with very little hope it would work for me. I have used it daily for 2.5 months and I have had zero eye infections or irritation. [...] I am so grateful to have found this product!”

Available in three shimmery hues, the Visionary Eye Shadow Stick has a creamy formula that adds a pop of color to lids, without any loose glitter, carbon black, lead and coal tar, or parabens. The eyeliner crayon is easy to apply, according to reviewers, and has a built-in sharpener on one end so you always have a good tip to work with.

One reviewer wrote: “Love all 3 colors, they do not irritate my eyes and it’s fun to mix and match or go solo with just one color.”

With a hydrating formula that includes castor oil and hyaluronic acid, this liquid eyeliner offers smooth application and bold definition. It’s free of ingredients like parabens, carbon black, lead and coal tar, and talc, and it can help support lash fullness over time.

One reviewer wrote: “Precision is a great word! This is the first time I’ve used liquid liner and it goes on perfectly!”