SUBSTACK: Plastic by Dr. Lara Devgan | The Science Behind Skincare

The Science Behind Skincare

Demystifying Active Ingredients, Layering Logic & Dermatologic Innovation

Scientific Beauty

The Science Behind Skincare

In a world where #SkinTok trends change faster than you can say “hyaluronic acid,” and beauty aisles are bursting with serums, oils, and peels promising miraculous transformations, the pursuit of radiant, healthy skin can feel like navigating a biochemical jungle.

But behind the glossy packaging and influencer endorsements lies a rich scientific landscape—a fusion of dermatology, pharmacology, and biotechnology—guiding what actually works for your skin.

In this piece, we dive deep into the science behind skincare, uncovering what active ingredients really do, how to layer products for maximum effect, and why some formulas—like those from Dr. Lara Devgan Scientific Beauty—stand out as evidence-based, plastic surgeon-formulated solutions.

Scientific Beauty | Vitamin C+B+E Ferulic Serum

What Are Active Ingredients? (And Why Should You Care?)

Active ingredients are the powerhouses of any skincare product. These are the components that directly target specific concerns—whether it’s fine lines, hyperpigmentation, acne, or dullness. Think of them as the “medicines” of your routine.

Some of the most studied and effective active ingredients include:

  • Retinoids (Retinol, Retinaldehyde, Tretinoin) – Vitamin A derivatives that increase cell turnover, improve texture, reduce fine lines, and treat acne.

  • Vitamin C (L-ascorbic acid) – A potent antioxidant that brightens skin, boosts collagen synthesis, and protects against UV damage.

  • Niacinamide (Vitamin B3) – Known for reducing inflammation, regulating oil, and improving barrier function.

  • Peptides – Short chains of amino acids that signal the skin to produce more collagen and elastin.

  • Alpha Hydroxy Acids (AHAs) – Chemical exfoliants like glycolic and lactic acid that dissolve dead skin cells and smooth texture.

  • Hyaluronic Acid – A humectant that holds 1,000 times its weight in water, hydrating and plumping the skin.

  • Growth Factors – Proteins that stimulate skin regeneration and repair.

👉 Science-backed pick:
Dr. Devgan’s Platinum Long Lash serum features a sophisticated blend of peptides and vitamins to promote fuller, longer lashes—without the prostaglandins that can cause pigmentary side effects in traditional lash serums like Latisse.

Scientific Beauty | Intensive Pigment Corrector

The Logic of Layering: Order Matters

One of the most misunderstood elements in skincare is product layering. Applying the right products in the wrong order can render them ineffective—or worse, irritate the skin.

Here’s a general rule of thumb:

  1. Cleanser – Start with a clean slate. Remove makeup, SPF, and debris.

  2. Active Serums – This is where your Vitamin C, retinol, or exfoliants go. Apply the thinnest-to-thickest.

  3. Moisturizer – Seals in hydration and buffers actives when needed.

  4. Oil (optional) – Helps lock in everything beneath it.

  5. Sunscreen (AM only) – Your most important anti-aging product.

📌 Physician-formulated tip:
Dr. Devgan’s Vitamin C+B+E Ferulic Serum is best applied on dry, clean skin in the morning. It features 20% L-ascorbic acid, ferulic acid, and niacinamide in a stabilized formula—giving your skin both antioxidant defense and brightening in one elegant step.

Scientific Beauty | Hyperpigmentation Collection

Understanding Retinoids Without Fear

Retinoids are perhaps the most lauded anti-aging ingredient, but they come with a reputation: peeling, redness, and “retinoid uglies.” What’s really happening?

When applied topically, retinoids:

  • Accelerate epidermal turnover

  • Stimulate collagen production in the dermis

  • Improve pigmentation irregularities

  • Help unclog pores

This process often triggers initial irritation (called “retinization”) as your skin acclimates. But choosing the right strength and frequency is key.

🌙 Skin-friendly option:
Dr. Devgan’s Retinal + Bakuchiol Serum combines retinaldehyde, encapsulated retinol, and bakuchiol (a plant-based retinol alternative) for results with reduced irritation. It also contains niacinamide to calm the skin and minimize redness.

Scientific Beauty | SPF 44 BB Cream

Barrier Function: Your Skin’s Defense System

The skin barrier is your body’s first line of defense. It keeps water in and pathogens out. Harsh exfoliation, overuse of actives, or skipping moisturizer can compromise it—leading to dryness, sensitivity, and breakouts.

Your barrier loves:

  • Ceramides – Lipids that form the skin’s natural “mortar”

  • Fatty acids – Help strengthen cell membranes

  • Cholesterol – Balances barrier lipid layers

  • Humectants and occlusives – Hydrate and lock in moisture

💧 Barrier-loving product:
Dr. Devgan’s Hyaluronic Serum is a deeply hydrating formula with mixed and low molecular weight hyaluronic acid and vitamin B5. It’s ideal for post-procedure skin or anyone on a retinol regimen.

Scientific Beauty | Hyperpigmentation Products: Before & After

The Role of pH and Formulation Science

A well-formulated skincare product is more than just a list of ingredients. The pH determines whether an acid exfoliant actually exfoliates. The delivery system decides whether retinol penetrates deeply or sits on the surface.

Let’s compare two hypothetical Vitamin C serums:

  • One has 15% L-ascorbic acid at pH 7—rendered ineffective.

  • The other has 15% L-ascorbic acid at pH 3.5—biologically active and skin-compatible.

⚗️ Stability and bioavailability are everything.

That’s why Dr. Devgan’s products are often praised in dermatologic circles: they’re built on clinical trials, pH-controlled delivery systems, and peer-reviewed literature—not trend-driven marketing.

Scientific Beauty | Platinum Long Lash

Cutting-Edge Trends in Dermatologic Science

Today’s skincare world is shaped by rapid advances in technology. Some exciting developments include:

  • Exosome Therapy – Using cell-derived vesicles to trigger skin healing and collagen production.

  • DNA Repair Enzymes – Target oxidative damage at the genetic level.

  • Stem Cell Conditioned Media – Touted to improve texture and firmness.

  • Topical Neurotoxins (still experimental) – A future where your cream might work like Botox? Researchers are exploring it.

While these trends sound promising, many are still under investigation. Always look for published studies and clinical evidence before investing.

🧪 Tried-and-true meets tech-forward:
Dr. Devgan’s Polypeptide Eye Cream blends medical-grade peptides, niacinamide, and growth factors to visibly firm the under-eye area while reducing puffiness and dark circles.

Scientific Beauty

The Final Word: Personalization is Power

Every face is different. What works for one person’s pigmentation may not help another’s hormonal acne. The real “secret” to great skin is consistency, science, and personalization.

Some guiding principles:

  • Use evidence-based actives, not gimmicks.

  • Layer with intention—thin to thick, low pH to neutral.

  • Support your barrier like it’s sacred.

  • Adjust your regimen seasonally and with age.

  • Don’t underestimate sunscreen—it is your anti-aging MVP.

And finally, work with a board-certified plastic surgeon, dermatologist, or a trusted professional. While medical-grade solutions like Dr. Lara Devgan Scientific Beauty can deliver powerful results, expert guidance will make your routine safer, smarter, and more effective.

Scientific Beauty

In Summary:

Skincare doesn’t have to be a mystery wrapped in a marketing campaign. With a little scientific literacy and a critical eye, you can decode ingredients, layer like a pro, and invest in products that deliver real transformation.

Your skin is your largest organ. Treat it like the scientific masterpiece it is.

SHOP DR. LARA DEVGAN SKINCARE at DrLaraDevgan.com or any of our authorized retailers: Nordstrom, Saks, Revolve, Violet Grey, Net a Porter, Moda Operandi, Casa Cipriani, The Surrenne, Equinox, Shopbop, The Maybourne Hotel Group, and more.


Subscribe to “Plastic by Dr. Lara Devgan” for more posts on Substack using the following button.

Signature Procedure | The Era of the Undetectable Facelift

Dr. Lara Devgan demonstrates her ability to perform undetectable facelifts in this TikTok.


The Era of the Undetectable Facelift: Dr. Lara Devgan’s Signature Approach

In a world where overdone cosmetic procedures are often visible from across the room, Dr. Lara Devgan has built a reputation for mastering the opposite: the art of subtle transformation. Known for her high-profile clientele and meticulous techniques, Dr. Devgan specializes in what many call the “undetectable facelift”—a procedure so refined that the results look completely natural, yet remarkably effective.

Precision Over Perfection

Dr. Devgan’s philosophy is rooted in a deep understanding of facial anatomy and aesthetics. Rather than pulling skin taut or drastically altering a patient's appearance, she focuses on restoring youthful proportions and structure. Her facelifts often involve tightening the deeper layers of the face (known as the SMAS layer), rather than just the skin. This approach not only results in a more natural look but also offers longer-lasting outcomes.

Minimal Scars, Maximum Subtlety

One of the hallmarks of her work is that you can’t tell it’s been done. Incisions are hidden in natural creases—around the ears, along the hairline—and are meticulously closed to minimize scarring. Her patients often return to their lives looking “refreshed” or “well-rested,” rather than “done.” Friends may wonder if they’ve been on vacation or had a great night’s sleep—never suspecting surgery.

A Surgeon Who Thinks Like an Artist

Dr. Devgan’s background combines rigorous scientific training with an artistic eye. As a Yale-educated, Johns Hopkins–trained plastic surgeon, she’s been recognized not only for her technical skill but also for her ability to preserve the unique character of each face. The result is a kind of surgical invisibility—facial rejuvenation that looks entirely organic, never overcorrected.

The Quiet Power of Natural Beauty

What sets Dr. Devgan apart is her commitment to discretion, subtlety, and elegance. Her work doesn’t scream “plastic surgery”—it whispers confidence. In an industry where over-enhancement can easily take center stage, Dr. Devgan proves that the best facelifts are the ones you’ll never notice.

Whether you're seeking to turn back the clock or simply want to look like the best version of yourself, Dr. Devgan’s undetectable facelift offers a compelling option—proof that less really can be more, in the right hands.


Appointment Inquiries

For inquiries and appointments, please email appointments at appointments@laradevganmd.com or call 212-452-2400. You may also use the following button to schedule an appointment online. We look forward to hearing from you. Thank you!

Scientific Beauty | 5 Questions about Facelifts

Dr. Lara Devgan answers 5 questions about facelifts in this TikTok!



5 Questions about Facelifts:

1.) The common misconception that they have to look unnatural or overdone: They can be very discreet, elegant and understated.

2.) How long is the recovery time for a typical facelift? I usually tell my patients one to two weeks of social downtime, two weeks until you’re “restaurant ready,” and six weeks until you’re “red carpet ready.”

3.) Is it better to combine a facelift with other procedures or is it better to do it alone? You can kind of go either way. In my opinion, every area of the face bears on the adjacent and anatomic areas so a combination of procedures can be very beautiful and is generally the preference I have. However, this is also very patient-specific and should be discussed with your doctor.

4.) What procedures do you commonly do alongside a facelift? Eyelid surgery, upper and lower lip leproplasty, temporal brow lift, neck lift, lip lift, buccal fat pad excision, and a very common one is autologous fat grafting.

5.) What’s the most common age for a facelift? It’s more about your anatomy than age. But I’ve done facelifts on patients ranging from their 30s to their 80s. I would say the 40s and 50s are the most common range.


Appointment Inquiries

For inquiries and appointments, please email appointments at appointments@laradevganmd.com or call 212-452-2400. You may also use the following button to schedule an appointment online. We look forward to hearing from you. Thank you!