Listen, I’m a Skinimalist at heart – my daily routine consists of a basic lineup of mostly drugstore products, and I abide by a “less is more” philosophy when it comes to slathering things on my face. The only exception here is Vitamin C serums.

Anastasiya Mihailovna / Getty Images

For context, I started getting hormonal acne a few years ago, and since then, I’ve been dealing with stubborn post-acne hyperpigmentation. Only within the last year have I gotten a handle on things, thanks in large part to vitamin C serums. Since incorporating it into my routine, my dark spots have noticeably faded.

Related: “Her Killer Has Never Been Found”: Nurses Are Sharing The Shocking Patient Stories That Haunt Them To This Day, And Oh My God

Since I know all too well the feeling of standing in the skincare aisle, Googling “best vitamin C serums,” I did God’s Work™ for us and asked three board-certified dermatologists about the most reliable products on the market.

Jacob Wackerhausen / Getty Images

Before we get into what they said, here’s a little info about the experts I interviewed:

Dr. Dara Spearman is a board-certified dermatologist and founder of Radiant Dermatology Associates.

Dr. Dendy Engelman is a board-certified dermatologic surgeon at Shafer Clinic Fifth Avenue.

Dr. Toral Vaidya, MD, MPH is a board-certified dermatologist at MDCS Dermatology.

So, what is Vitamin C serum, actually?

Mariya Borisova / Getty Images

Vitamin C serum is a topical skincare treatment that disperses a highly concentrated amount of the antioxidant to the skin. Not only does it help protect skin from environmental aggressors ike UV exposure and pollution, but it also boosts collagen production and brightens the complexion. In addition, it “improves the appearance of fine lines and uneven skin tone,” and “supports overall skin health when used regularly,” Dr. Engelman and Dr. Spearman said, respectively.

Dr. Vaidya explained the science behind it all: “Vitamin C inhibits an enzyme called tyrosinase, which is involved in melanin (pigment) production.” She added that “by slowing this process, vitamin C can help prevent the formation of excess pigmentation.” 

“Additionally,” she continued, “as an antioxidant, it neutralizes environmental free radicals that contribute to skin aging, inflammation, and hyperpigmentation.”

What should you look for on the label?

Curly_photo / Getty Images

One of the most popular forms of Vitamin C serum includes L-ascorbic acid, “which is the most studied and effective form of vitamin C,” Dr. Spearman explained. “Ideally, it should be in the 10 to 20% range.” 

However, it’s worth mentioning that a higher percentage doesn’t necessarily mean better efficacy. “Vitamin C works in a dose-dependent way up to a point,” Dr. Engelman added. “After about 20%, you hit diminishing returns, and irritation risk climbs. Consistency is more important than chasing the highest concentration.”

Dr. Vaidya added that outside of L-ascorbic acid, there are “vitamin C derivatives, which differ in potency and stability.” She said that “L-ascorbic acid is more potent but less stable, whereas derivatives tend to be gentler and more chemically stable. Some skincare products also use plant-derived forms of vitamin C, which are generally gentler on the skin while still providing strong antioxidant benefits.”

Related: 15 Subtle Symptoms That Led People To Discover They Had A Very Serious Illness, And I’m So Glad They Didn’t Ignore Them

How does Vitamin C serum fit into your routine?

Strelciuc Dumitru / Getty Images

The general consensus is that Vitamin C should be applied in the morning, after cleansing, but before moisturizer and sunscreen. Applying the serum early in the day is ideal because, according to Dr. Engelman, “it acts as an antioxidant shield against environmental stressors like UV rays and pollution throughout the day. While sunscreen protects from UV radiation, vitamin C helps neutralize the free radicals that still form, so they work beautifully together.”

What results should you realistically expect, and how long does it take to see them?

Delmaine Donson / Getty Images

With consistent use, you might notice improvement in overall skin brightness and texture, including faded dark spots and greater radiance. According to all three doctors, results can be seen in as little as 8 to 13 weeks. 

Related: “It’s Not Normal”: Doctors And Nurses Are Calling Out The Biggest Health Warning Signs You Should Never Ignore

Is Vitamin C right for everyone?

Mariya Borisova / Getty Images

Vitamin C serum works well for most skin types, however, those with sensitive skin or rosacea-prone skin should be careful. “In those cases, I may recommend starting with a lower percentage or using it every other day,” Dr. Spearman said. “I always recommend patch testing, and it’s a good idea for any skin type!”

Dr. Vaidya added that for those with more sensitive skin, “it’s important to choose gentler formulations (with vitamin C derivatives) to minimize potential irritation.”

“A common mistake I see is using too many actives alongside vitamin C,” she explained. “It’s best to apply vitamin C at a separate time of day, or even on a different day, when incorporating other actives such as retinoids or exfoliants.”

And finally, the Vitamin C serums dermatologists actually recommend:

The more affordable options:

Dr. Althea’s Vitamin C Boosting Serum ($24) and Dr. Althea’s Gentle Vitamin C Serum ($24): “The Vitamin C Boosting Serum uses a 60% vitamin C‑rich Hippophae Rhamnoides Water and niacinamide, along with tranexamic acid to target dark spots,” Dr. Vaidya said. “The Gentle Vitamin C Serum offers a sensitive‑skin‑friendly formula with niacinamide and 3‑O‑ethyl ascorbic acid, a vitamin C derivative. Both are lightweight, absorb easily, and are designed to improve overall skin clarity with regular use.”

Maelove’s Glow Maker ($33): Dr. Spearman recommends this as “a more affordable option.” She said, “It’s a solid choice with a similar antioxidant profile.”

La Roche-Posay Pure 12% Vitamin C Serum ($45): “This is a great multitasker,” Dr. Engelman explained. “It brightens and hydrates the skin, reduces the look of fine lines and wrinkles, and smoothes texture, to make your skin look more radiant and glowy.”

Related: This Self-Awareness Test Will Tell You How Emotionally Intelligent You Really Are

The slightly more expensive standouts:

Pareva Beauty C35.5 Firming Glow Serum ($74): Dr. Spearman recommends this as it “combines 30% tetrahexyldecyl ascorbate (THD), an oil-soluble form of Vitamin C that is more stable and is powered by Molecur 3.” She explained that “Molecur 3 is the brand’s proprietary technology that targets exosomes, energizes skin through NAD+, and decreases inflammation, making it a good option for patients focused on preventing future aging for firmer, brighter looking skin.”

IMAGE Skincare VITAL C Anti-Aging Serum ($91): “The antioxidant blend in the formula helps neutralize daily damage from things like pollution and UV exposure, while also providing a more luminous and smooth texture, all while still being gentle on the skin,” Dr. Engelman said.

The ones to splurge for:

Vivier Serum 10 ($108): “This is a great option for those newer to Vitamin C serums,” Dr. Engelman said, adding, “it uses L-Ascorbic Acid USP, a bio-available form of Vitamin C, which delivers in a unique patented system to reduce the chances of irritation.”

SkinCeuticals’ C E Ferulic ($185) or Phloretin CF ($185): Simply put, Dr. Spearman said, “[these products] have stabilized formulas with strong antioxidant combinations.”

Have you added Vitamin C to your skincare routine yet? What are your go-to products? Share in the comments.

You Might Like: 26 Helpful Tips That’ll Make You Feel Like You’ve Got A PhD In Makeup

You Might Like: 29 Lazyish Ways To Deep Clean Your Home You’ll Wish You’d Known About Sooner

Also in Goodful: How Many Of These 27 “Basic Adult Life Skills” Do You Know How To Do?

Read it on BuzzFeed.com