Understanding Retinoids

Retinoids are a big topic in the skincare world, and for good reason. With consistent use, they have become an important component in healthy skin aging.

Retinoids are a family of vitamin A–derived compounds widely used in skincare and dermatology. Retinoids affect how skin cells grow and behave. They work at a cellular level, basically “training” your skin to act younger and healthier. They’re some of the most studied and effective ingredients for improving skin texture, treating acne, and reducing signs of aging.

Here’s a deeper, science-focused look at how retinoids actually work inside your skin. This is where they really stand out compared to most skincare ingredients.

Retinoids come in different forms that vary in strength, speed, and irritation level. Most retinoids must be converted into the active form of Vitamin A to work: Retinyl esters → Retinol → Retinal → Retinoic acid

Each step requires an enzymatic conversion in the skin, therefore more steps = weaker + slower effect, while fewer steps = stronger + faster results.

Here’s a clear breakdown from gentlest to strongest:

Retinyl Esters (Gentlest)

• Retinyl palmitate, Retinyl acetate

How they work:
They need multiple conversion steps in the skin to become active.

Best for:

• Sensitive skin and beginners

Pros: Very gentle, low irritation
Cons: Slowest results

Retinol (Most common)

This is the standard “retinol” you see in skincare.

How it works:
Converts into retinal → then into retinoic acid (active form).

Best for:

• Beginners to intermediate users

• Anti-aging + mild acne

Pros: Good balance of effectiveness and tolerability
Cons: Can still cause dryness/peeling

Retinal (Retinaldehyde)

Often labeled as “retinal.”

How it works:
Only one step away from active form → faster than retinol.

Best for:

• People who want quicker results than retinol

• Acne-prone skin

Pros: More potent, antibacterial properties
Cons: Slightly more irritating than retinol

Retinoic Acid (Prescription-strength & Strongest)

Example: Tretinoin

How it works:
Already in active form (retinoic acid).

Best for:

• Moderate to severe acne

• Deep wrinkles/significant sun damage

Pros: Fast, proven results
Cons: Highest irritation, requires prescription, not beginner friendly

It is important to note that consistency and building gradual tolerance is the key to success with retinoids.

Benefits of Retinoids:

-Increase cellular turnover= smoother skin

-Increase collagen synthesis= more collagen, less breakdown, firmer skin

-Sebum regulation= reduce comedones/acne

-Pigmentation control= reduce melanin transfer (fade hyperpigmentation)

-Epidermal thickening= stronger and more resilient epidermis

Adding a retinoid in your routine can be tricky at first due to potential irritation. A phase called the “retinization period” occurs due to a rapid increase in cell turnover and a temporary disruption of the skin barrier. Skin may feel more dry, red, and sensitive. This is why I always recommend starting low and slow.

Tips on how to use a Retinoid:

• Start 2–3 nights per week

• Use a pea-sized amount for your whole face

• Apply on dry skin

• Follow with moisturizer

• Use “sandwich method” (moisturize, retinoid, moisturize)

• Always wear sunscreen during the day

Who should be cautious

• Pregnant or breastfeeding individuals

• People with very sensitive skin conditions (like eczema or rosacea)

Retinoids don’t just exfoliate, they reprogram skin cells at the cellular level.

Few skincare ingredients operate this deeply, which is why retinoids are often considered the gold standard in dermatology.