You may look young, but if there's a line starting to form -- even if you wouldn't call it a wrinkle -- preventative injections will stop it in its tracks. "A lot of young people have what I call the uni-line in the forehead -- the line that crosses all the way over," says New York City dermatologist Ellen Marmur, MD, of Marmur Medical. "And they can benefit from baby Botox or baby Dysport." She uses just a small amount of the toxin to smooth a line even before it turns into a wrinkle.

All the doctors I talked to agree that being proactive in your 20s and 30s makes things easier -- and could even save you money -- later. If you take a preventative approach, you'll need less product, less often as you get older, says Imber.

If you have a lopsided feature that bothers you, it can probably be tweaked with filler. Fillers can be used to add angles to the face or balance out an asymmetrical face, says Imber. He uses fillers (or fat transfer) to enhance the angularity of the face and make someone look younger.

"Every individual with asymmetry requires treatment that is tailored to their particular needs," explains Shamban. "So, if they have one side of their forehead that is hypermobile lifting of the brow, Botox can be used to relax the brow. If they are asymmetrical with one cheek larger than the other, or one side of the lip larger than the other, then this can most commonly be corrected by injection of a hyaluronic acid [filler]."

You wear multiple layers of sunscreen. You can't go a day without your favorite antioxidant serum. Retinol is your BFF. Injectables might just be a logical addition to your anti-aging regimen -- even if you don't have wrinkles.

"It's about preserving what you have," says Marmur. "Wouldn't you be happy to stay like this for 30 years?" And when it comes to preventative injectables, sometimes the results look like nothing at all. "Every person who comes to my office wants to look natural," says Marmur. "And I tell everyone, my job is to underwhelm you."

If the only thing holding you back is fear of what other people will think, then it's time to get over it. You're doing this for you, and you don't have to tell anyone. Plus, according to Galderma, 4.4 million women in the US have tried fillers or toxins, and 2 million are routinely using them. You'll be in good company.

And anything that makes you feel more confident shouldn't be considered frivolous. "I reassure [patients] that these treatments to improve the appearance or reverse signs of premature aging are, in fact, tightly connected to positive self-image and self-esteem," says Shamban.

If none of the aforementioned reasons apply to you, then preventative treatment might not be right for you -- and a doctor may even turn you away. "There are a lot of reasons to say no," says Marmur. "If I don't think I can improve upon perfection, then no."