Ingredient Encyclopedia

Welcome to the Ingredient Encyclopedia

Discover what’s inside your skincare — from retinol to aloe vera — with clear guides on benefits, uses, and safety.

Ingredient Encyclopedia

Tamanu Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Unlike "slippery" botanical oils, Tamanu Oil is unique because it is a resinous oil. It contains a significant amount of Calophyllic Acid—a unique fatty acid found nowhere else—and Calophyllolide, a non-steroidal anti-inflammatory agent. These "extra" components give Tamanu its signature dark green color, viscous texture, and potent ability to support skin that is physically damaged or chronically red. In routine terms, it doesn't just "soften"; it acts as a biological bandage, making it the premier choice for fading the look of post-blemish marks and calming the "heat" of a compromised barrier.

Ingredient Encyclopedia

Argan Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Unlike many oils that lean heavily toward one fatty acid, Argan Oil is prized for its balanced lipid profile, containing roughly equal parts Oleic Acid (Omega-9) and Linoleic Acid (Omega-6). This "Goldilocks" ratio makes it uniquely versatile: the Oleic acid provides deep nourishment for dry patches, while the Linoleic acid supports the skin’s own ceramide production to prevent moisture loss. Furthermore, Argan contains rare plant sterols—Schottenol and Spinasterol—which are not found in many other vegetable oils and are known for their ability to support skin recovery. This makes it more than just a sealer; it is a bio-active support system for a stressed skin barrier.

Ingredient Encyclopedia

Marula Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
While Sunflower and Safflower oils are prized for their high Linoleic acid (Omega-6) content, Marula Oil is defined by its high Oleic Acid (Omega-9) content (typically 70–78%). Oleic acid is a "heavier" fatty acid that is exceptionally good at penetrating the surface to deliver deep-seated softness. This makes it a powerhouse for true dry skin—the kind that lacks its own natural oils. Marula doesn't just sit on the surface; it integrates into the upper layers of the skin to provide a "plumping" effect that smooths out fine lines caused by dehydration. Furthermore, its high concentration of phenolic compounds and flavonoids acts as a natural antioxidant shield, protecting the barrier from the oxidative stress of daily pollution.

Ingredient Encyclopedia

Meadowfoam Seed Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Meadowfoam Seed Oil is a chemical outlier in the botanical world. While most plant oils are composed of mid-chain fatty acids that break down easily, Meadowfoam contains over 95% long-chain fatty acids ($C_{20}$ and $C_{22}$). These longer chains are naturally more resistant to heat and air, giving the oil its legendary shelf-life and "cushiony" texture. Because it is so structurally stable, it doesn't just protect your skin; it acts as a stabilizing base for the other ingredients in your routine, helping more delicate oils (like Rosehip or Evening Primrose) last longer when blended together.

Ingredient Encyclopedia

Sunflower Seed Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Sunflower Seed Oil is a scientific favorite for barrier repair because of its exceptional Linoleic Acid (Omega-6) content. While many oils are popular, Sunflower has been clinically shown to actively support the skin's ability to synthesize its own ceramides. It doesn't just sit on top; it provides the "building blocks" that help the skin's lipid bilayer stay organized and watertight. This makes it a gold standard for atopic-prone or sensitised skin that struggles to hold onto moisture. Its lightweight nature and high vitamin E content also provide a built-in antioxidant shield, helping to protect the very barrier it helps to build.

Ingredient Encyclopedia

Safflower Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Safflower Oil is distinguished in the botanical world by its high concentration of Linoleic Acid (Omega-6). Unlike high-oleic oils (like Olive or Macadamia) which provide a heavy, rich cushion, high-linoleic oils are prized for their "thin" consistency and their ability to integrate into the skin's lipid barrier without feeling occlusive. Research suggests that oily and acne-prone skin often lacks sufficient linoleic acid in its natural sebum, which can lead to thicker, more "sticky" oil that clogs pores. By supplying topical linoleic acid, Safflower Oil helps maintain a more fluid sebum consistency, making it a rare "oil-friendly oil" for those who struggle with congestion.

Ingredient Encyclopedia

Macadamia Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Macadamia Oil is a unique biological standout in the botanical world due to its exceptionally high concentration of Palmitoleic Acid (Omega-7). While most plant oils are rich in Omega-6 or Omega-9, Macadamia is one of the few concentrated plant sources of Omega-7—a fatty acid that is a natural component of human sebum but decreases significantly as we age. This makes it a "bio-mimetic" replenisher that helps "fill in the gaps" of a maturing or depleted barrier. Its structure allows it to provide a non-greasy, velvet-like finish that feels more like a second skin than a heavy oil coating.

Ingredient Encyclopedia

Olive Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Olive Oil is a heavyweight botanical lipid distinguished by its remarkably high Squalene content (not to be confused with squalane), a natural component of human sebum. This unique chemical profile makes it a "bio-identical" softener that the skin recognizes and integrates quickly into the upper layers of the stratum corneum. Beyond its triglycerides, Olive Oil contains high levels of Oleocanthal, a phenolic compound that provides a "calming signal" to the skin surface, making it particularly effective for reducing the sensory discomfort of windburn or extreme dryness. When applied, it forms a robust, semi-occlusive film that mimics the skin’s own natural lipid mantle.

Ingredient Encyclopedia

Avocado Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Avocado Oil is a heavyweight champion in the world of botanical lipids, distinguished by its high concentration of Oleic Acid (Omega-9) and a unique fraction of unsaponifiables—plant sterols and vitamins that remain even after the oil is processed. Unlike "dry" oils that evaporate or absorb instantly, Avocado Oil has a superior ability to penetrate the upper layers of the dermis, delivering Lutein (a powerful carotenoid) and Chlorophyll directly where they can support cellular comfort. This makes it a primary choice for skin that is not just dry, but "depleted"—lacking the essential fatty acids required to keep the barrier supple and resilient.

Ingredient Encyclopedia

Sweet Almond Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Sweet Almond Oil is a rich, time-tested emollient that sits perfectly between "light" and "heavy" oils. Its primary strength lies in its high concentration of Oleic Acid (Omega-9), which gives the oil its signature "cushiony" slip and deep softening ability. Unlike thinner oils that disappear instantly, Sweet Almond Oil provides a sustained moisture-locking barrier, making it ideal for skin that feels "papery" or loses hydration quickly. Furthermore, it is naturally rich in Vitamin E (tocopherol) and Phytosterols, which support the skin's structural integrity by mimicking the natural lipids found in the stratum corneum. This allows the oil to "fill in" the microscopic cracks of a dry barrier, leading to an immediate improvement in surface smoothness and light reflectivity.

Ingredient Encyclopedia

Grapeseed Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Grapeseed Oil is a byproduct of the winemaking process, but in skincare, it is a nutritional powerhouse. It is distinguished by its exceptionally high content of Linoleic Acid (Omega-6)—often comprising 65% to 75% of its total fatty acid profile. This specific lipid is vital because individuals with blemish-prone or combination skin are often found to have lower levels of Linoleic Acid in their surface sebum. By supplementing with Grapeseed Oil, you aren't just "oiling" the skin; you are providing the building blocks for a thinner, more fluid, and healthier sebum that is less likely to become sticky or congest pores. Furthermore, it contains Oligomeric Proanthocyanidin Complexes (OPCs)—antioxidants that are significantly more potent than Vitamin C and E in neutralizing the environmental triggers of early aging.

Ingredient Encyclopedia

Hemp Seed Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Hemp Seed Oil is extracted from the seeds of the Cannabis sativa plant. It is widely recognized in dermatology as one of the most balanced botanical oils because it contains an ideal 3:1 ratio of Omega-6 (Linoleic Acid) to Omega-3 (Alpha-Linolenic Acid). This specific ratio closely mimics the skin’s natural lipid structure, allowing the oil to integrate into the intercellular "mortar" of the skin barrier without disrupting its natural flow. Unlike heavier oils that can sit on top of the skin, Hemp Seed Oil acts as a "fluidity regulator," ensuring the skin remains flexible and soft while simultaneously preventing transepidermal water loss (TEWL).

Ingredient Encyclopedia

Sea Buckthorn Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Sea Buckthorn Oil (SBO) is often referred to as a "multivitamin for the skin" due to its dense concentration of nutrients. It is the only plant source known to contain all four Omega fatty acids: Omega-3, -6, -9, and the incredibly rare Omega-7 (Palmitoleic Acid). While Omegas 3 and 6 repair the barrier, Omega-7 is a key component of human skin that helps promote the look of "plumpness" and speeds up the appearance of skin recovery. Chemically, it is also loaded with Beta-Carotene (which gives it that sunset-orange hue) and Vitamin E, making it a powerful biological shield against environmental stressors like pollution and UV-induced oxidation.

Ingredient Encyclopedia

Evening Primrose Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Evening Primrose Oil (EPO) is a botanical oil extracted from the seeds of the Oenothera biennis plant. What sets it apart from other oils is its exceptionally high concentration of Gamma-Linolenic Acid (GLA), an Omega-6 fatty acid that the human body cannot produce on its own. While most oils simply sit on the surface to prevent water loss, the GLA in Evening Primrose Oil is thought to integrate into the skin’s cell membranes. This helps "re-glue" the skin cells (corneocytes) together, significantly reducing the microscopic gaps that cause sensitivity, redness, and that signature "raw" feeling of a compromised barrier.

Ingredient Encyclopedia

Jojoba Oil – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Jojoba Oil is a premium botanical lipid that functions as a biomimetic wax ester. While commonly referred to as an oil, it is chemically a liquid wax that mirrors approximately 25-30% of human sebum. This unique structural harmony allows Jojoba to penetrate the follicular openings and integrate with the skin's natural lipid mantle without the "heavy" occlusion of traditional triglyceride oils (like Coconut or Olive oil). By providing non-comedogenic emolliency, Jojoba Oil supports the skin's moisture barrier, smooths the stratum corneum, and provides a breathable protective seal that reduces Transepidermal Water Loss (TEWL).

Ingredient Encyclopedia

Tocopherol (Vitamin E) – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Tocopherol, widely known as Vitamin E, is a fat-soluble antioxidant that serves two critical roles in skincare: protecting the product and protecting the skin. In the bottle, it prevents oils from oxidizing (turning rancid), ensuring the formula remains stable and non-irritating. On the skin, it integrates into the lipid barrier to provide antioxidant defense and a "cushioned" emollient feel. Because it is lipid-soluble, it excels at reducing the "stressed, tight" sensation common in barrier-impaired routines. It is rarely the star of the show, but it is the ultimate "supporting actor," making high-potency actives like Retinol and Vitamin C easier to tolerate by reinforcing the skin’s natural comfort levels and preventing oxidative stress.

Ingredient Encyclopedia

Sorbitol – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Sorbitol is a sugar alcohol-derived humectant that serves as a foundational hydration-support ingredient. While more famous humectants like Hyaluronic Acid grab the headlines, Sorbitol is prized by formulators for its unique "cushioning" effect. It works by attracting water molecules to the skin's surface, but unlike some humectants that can feel tacky or "tight" as they dry, Sorbitol maintains a smooth, silky slip. It is particularly effective in cleansers and rinse-off products, where it helps prevent the "squeaky-clean" stripped feeling by leaving a microscopic veil of moisture behind. Because it is chemically stable and non-reactive, it is an ideal companion for sensitive skin and acts as a texture-smoother in layered routines.

Ingredient Encyclopedia

Trehalose – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Trehalose is a naturally occurring disaccharide (sugar) renowned for its remarkable ability to mimic the "Anhydrobiosis" process—the survival mechanism used by desert plants to endure extreme drought. In skincare, Trehalose acts as a high-performance humectant that goes beyond simple hydration. It forms a protective complex that stabilizes cell membranes and proteins, effectively "locking" the skin’s structure in place when faced with dehydration, heat, or cold. This makes it an essential ingredient for environmental protection, ensuring that skin remains flexible and "cushioned" even in harsh conditions like dry air conditioning or winter winds.

Ingredient Encyclopedia

Sodium PCA – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Sodium PCA (Sodium Pyrrolidone Carboxylate) is a high-performance humectant that serves as a cornerstone of your skin's Natural Moisturizing Factor (NMF). While most humectants are foreign molecules that attract water from the outside, Sodium PCA is "skin-identical"—it is already naturally present in your skin cells to maintain hydration and elasticity. It is exceptionally hygroscopic, meaning it can hold several times its weight in water, yet it possesses a unique, non-sticky finish that makes it superior to traditional glycerin for those who dislike a heavy feel. By replenishing the NMF, Sodium PCA doesn't just "wet" the surface; it restores the skin's internal ability to remain flexible and resilient against environmental stress.

Ingredient Encyclopedia

Pentylene Glycol – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Pentylene Glycol is a high-performance diol (a liquid humectant) that serves as a cornerstone for "elegant" skincare formulations. Unlike glycerin, which can sometimes feel heavy or sticky, Pentylene Glycol provides a weightless, silky finish while effectively binding moisture to the skin. Its unique molecular structure makes it a dual-threat: it acts as a penetration enhancer, helping other active ingredients reach deeper into the skin, and as a preservative booster. By making the environment hostile for bacteria, it allows brands to use fewer traditional preservatives, making it a favorite for Sensitive-Skin and minimalist formulas.