At CLEARSTEM, every ingredient we choose serves a purpose. There are no fillers, no pore-cloggers, and no marketing gimmicks. Each formula is meticulously crafted to deliver visible results while respecting the delicate balance of acne-prone and aging skin.

In this guide, I will take you through the key ingredients that make CLEARSTEM products so effective. Whether you are a skincare enthusiast or a complete beginner, understanding these ingredients will help you make informed choices for your skin.

CLEARSTEM is built on the principle of non-comedogenic skincare — every ingredient is verified to be safe for acne-prone skin before it ever makes it into a formula.

Plant Stem Cells

Plant stem cells are one of the most exciting advancements in anti-aging skincare. Extracted from specific plants — most commonly the Swiss apple (Uttwiler Spatlauber) or edelweiss — these cells are rich in antioxidants, amino acids, and growth factors that protect and rejuvenate the skin.

How they work: Plant stem cells stimulate the skin's own stem cells to divide and repair more efficiently. They protect against environmental stressors, boost collagen production, and help reduce the appearance of fine lines and wrinkles. Unlike harsh retinoids, they achieve these results without irritation or peeling.

Why we use them: Plant stem cells are a cornerstone of our anti-aging strategy at CLEARSTEM. They allow us to deliver visible anti-aging benefits without compromising our commitment to non-comedogenic, gentle formulations. They are particularly valuable for adult acne sufferers who need anti-aging support but cannot tolerate retinol.

Found in: CELLRENEW Stem Cell Anti-Aging Serum, HYDRAGLOW Stem Cell Moisturizer

Image: CLEARSTEM Ingredients
Every CLEARSTEM ingredient is carefully selected for efficacy and pore-safety.

Bakuchiol

Bakuchiol is a plant-derived compound extracted from the seeds of the Psoralea corylifolia plant. It has been used in traditional Ayurvedic and Chinese medicine for centuries, but it has recently gained global attention as a natural alternative to retinol.

How it works: Bakuchiol works through a different mechanism than retinol but produces remarkably similar results. It regulates gene expression related to collagen production, accelerates cell turnover, and reduces the appearance of fine lines, wrinkles, and hyperpigmentation — all without the irritation, redness, and peeling commonly associated with retinoids.

Why we use it: Bakuchiol is a game-changer for adult acne sufferers who want to address both breakouts and signs of aging. Unlike retinol, bakuchiol is non-comedogenic, safe for sensitive skin, and can be used during pregnancy. For a full comparison, see our Bakuchiol vs Retinol guide.

Found in: HYDRAGLOW Stem Cell Moisturizer, CELLRENEW Stem Cell Anti-Aging Serum

Mandelic Acid

Mandelic acid is an alpha-hydroxy acid (AHA) derived from almonds. It is the largest molecular weight AHA, which means it penetrates the skin more slowly and gently than other chemical exfoliants like glycolic or lactic acid.

How it works: Mandelic acid exfoliates the top layer of dead skin cells, unclogs pores, and stimulates collagen production. Its larger molecular structure means it works gradually, making it ideal for sensitive and acne-prone skin. It also has antibacterial properties that specifically target C. acnes, the bacteria involved in acne breakouts.

Why we use it: Mandelic acid is the perfect exfoliant for acne-prone skin. It clears pores without causing the irritation that stronger acids can trigger. Combined with vitamin C and turmeric in our CLEARITY Serum, it becomes a powerhouse for clearing blackheads and brightening skin.

Found in: CLEARITY Blackhead Dissolver Serum, VITAMINSCRUB

Discover the power of mandelic acid, bakuchiol, and plant stem cells in our best-selling serums.

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Peptides

Peptides are short chains of amino acids that serve as the building blocks of proteins like collagen, elastin, and keratin. As we age, our natural collagen production declines, leading to fine lines, wrinkles, and loss of firmness.

How they work: When applied topically, peptides signal the skin to produce more collagen and elastin. They act as messengers, telling your skin cells to behave as if they are younger and more active. Different types of peptides target different concerns — some boost collagen, others improve barrier function, and still others reduce inflammation.

Why we use them: Peptides are a gentle, non-irritating way to support the skin's structure and firmness. They are particularly valuable in our anti-aging formulas because they deliver results without the dryness or irritation associated with stronger anti-aging actives.

Found in: CELLRENEW Stem Cell Anti-Aging Serum

Snow Mushroom & Reishi

Medicinal mushrooms have been used in Eastern skincare traditions for centuries, and modern science is finally catching up. At CLEARSTEM, we use two powerhouse mushrooms: snow mushroom (Tremella fuciformis) and reishi mushroom (Ganoderma lucidum).

Snow Mushroom

Snow mushroom holds up to 500 times its weight in water — surpassing even hyaluronic acid in its hydrating capacity. It forms a breathable, occlusive film on the skin that locks in moisture without clogging pores. Studies show that regular use improves skin elasticity and reduces trans-epidermal water loss (TEWL).

Reishi Mushroom

Reishi, known as the "mushroom of immortality" in Chinese medicine, is rich in polysaccharides and triterpenes. It reduces inflammation, soothes redness, and provides powerful antioxidant protection. For acne-prone skin, reishi is particularly valuable because it helps calm the inflammatory response that makes breakouts red, swollen, and painful.

Found in: CELLRENEW Stem Cell Anti-Aging Serum, HYDRAGLOW Stem Cell Moisturizer

Turmeric

Turmeric (Curcuma longa) has been a staple of Indian skincare for thousands of years. Its active compound, curcumin, is one of the most potent anti-inflammatory and antioxidant substances known to science.

How it works: Curcumin inhibits the activity of inflammatory enzymes and neutralizes free radicals that damage skin cells. For acne-prone skin, this means reduced redness, faster healing of breakouts, and less post-inflammatory hyperpigmentation (the dark marks that linger after a pimple heals).

Why we use it: Turmeric complements our other active ingredients beautifully. In our CLEARITY Serum, it works alongside mandelic acid and vitamin C to brighten skin and reduce the dark spots that acne leaves behind.

Found in: CLEARITY Blackhead Dissolver Serum

Squalane

Squalane (note the "a" — not to be confused with squalene) is a fully hydrogenated, stable version of squalene, a lipid that is naturally produced by human sebaceous glands. It is a Grade 0 on the comedogenic scale, meaning it absolutely will not clog pores.

How it works: Squalane is a near-perfect match for your skin's natural sebum. It absorbs quickly, provides deep hydration without greasiness, and helps regulate the skin's own oil production. When your skin detects squalane, it gets the signal that it has enough oil — which can actually reduce excess sebum production over time.

Why we use it: Squalane is the ideal moisturizing base for acne-prone skin. It hydrates, regulates oil, and supports the skin barrier without any risk of congestion. It is the primary moisturizing ingredient in our HYDRAGLOW Moisturizer.

Found in: HYDRAGLOW Stem Cell Moisturizer, CELLRENEW Stem Cell Anti-Aging Serum

Niacinamide

Niacinamide (vitamin B3) is one of the most versatile and well-researched ingredients in modern skincare. It is suitable for virtually every skin type and addresses an impressive range of concerns.

How it works: Niacinamide strengthens the skin barrier, reduces inflammation, regulates oil production, minimizes pore appearance, and fades hyperpigmentation. It also boosts the production of ceramides — the lipids that hold skin cells together and keep the barrier intact.

Why we use it: Niacinamide is a multi-tasking ingredient that supports nearly every aspect of skin health. For acne-prone and aging skin, its ability to regulate oil while strengthening the barrier is particularly valuable. It works synergistically with our other active ingredients.

Vitamin C (SAP)

Vitamin C is the gold standard antioxidant in skincare, but not all forms of vitamin C are created equal. CLEARSTEM uses Sodium Ascorbyl Phosphate (SAP), a stable, non-irritating derivative of vitamin C.

How it works: SAP converts to L-ascorbic acid on the skin, providing all the benefits of vitamin C — antioxidant protection, collagen stimulation, and brightening — without the instability and irritation of pure L-ascorbic acid. SAP has also been shown to have antibacterial activity against C. acnes, making it particularly valuable for acne-prone skin.

Why we use it: SAP is the ideal form of vitamin C for sensitive, acne-prone skin. It is more stable than L-ascorbic acid (meaning it does not oxidize and turn brown in the bottle) and is gentle enough for daily use. You will find SAP in our GENTLECLEAN cleanser, where it provides antioxidant protection with every wash.

Found in: GENTLECLEAN Vitamin C Daily Cleanser, CLEARITY Blackhead Dissolver Serum

SAP, niacinamide, and zinc PCA work together in our formulas to clear and protect your skin.

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Zinc PCA

Zinc PCA is a zinc salt of pyrrolidone carboxylic acid, a compound naturally found in human skin. It is one of the most effective ingredients for regulating oil production and controlling acne.

How it works: Zinc PCA inhibits 5-alpha-reductase, the enzyme that converts testosterone to dihydrotestosterone (DHT). DHT is the hormone that stimulates sebaceous glands to produce excess oil, which leads to clogged pores and acne. By reducing this conversion, Zinc PCA helps normalize oil production at the source.

Why we use it: For adult acne sufferers, hormonal fluctuations are often the primary trigger for breakouts. Zinc PCA addresses this root cause by regulating oil production hormonally. It also has antimicrobial and anti-inflammatory properties, making it a triple threat against acne.

Putting It All Together

What makes CLEARSTEM unique is not just the individual ingredients — it is how they work together. Every product is formulated to complement the others, creating a complete system that addresses acne, aging, and overall skin health simultaneously.

The non-comedogenic commitment is the foundation. Once we know no pore-cloggers are present, we can layer in powerful actives like bakuchiol, mandelic acid, and plant stem cells that deliver real, visible results. The result is a line that you can trust completely — no guesswork, no breakouts from your skincare, just clear, healthy, youthful skin.

For more on how these ingredients come together in a daily routine, read our Anti-Acne & Anti-Aging Guide.