Callum Jones
Deliberating whether to have botox or not is something many are experiencing right now, though what it did to one doctor may help you make your mind up.
Dr Bita Farrell went viral in June last year after volunteering to be her very own 'lab rat' to show people the power of the prescription drug, botulinum toxin.
While the protein is meant to be used for medical purposes, it has become apparent it works well for cosmetic purposes as well.
Taking botox, for example, temporarily paralyses the muscles in the face, giving the appearance of smoother-looking skin.
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Of course, it's important to know the science behind botox, but a video uploaded by Dr Farrell on Instagram has documented what it looks like in reality.
Well, the medical expert looked into the impact of injecting only half of your face.
The physician, who trained and practised as a Clinical Professor at UCLA, has over 20 years of injecting experience - so she certainly knows what she's doing.
Dr Farrell injected herself two weeks prior to filming the video having injected the lower muscles on the right side of her face with botox.
She targeted the DAO muscle, which pulls down the corners of the mouth, and the platysma muscle, known for helping out facial expressions and mouth movements.
"Now for you, two weeks later, I present my results as I try and contract my lower face muscles," she told her followers.
The results certainly spoke volumes as the medic was seen struggling to get any movement out of the right side of her face, though her left side was certainly a lot more expressive.
Dr Farrell added: "You can see that the platysma muscle on this [left] side is really contracting and pulling my jawline down, and so is my DAO, pulling the corner of my mouth down."
Dr Farrell explained the impact of Botox further in the caption, saying: "Muscles of the face either pull up or pull down. When the muscles that pull the lower face down (platysma and DAO) are injected and relaxed with a neuromodulator such as Botox, the muscle that pulls the mid face up (zygomaticus or cheek muscle) dominates and pulls the face up!
"This can help reduce the appearance of marionette lines, jowls, frown (rbf, or sad face), and the nasolabial folds. It also lifts the neck and can sharpen the jawline and make the cheeks appear a bit fuller and more lifted."