DEVA INSIGHTS & INDUSTRY NEWS

Skin Feels Drier After Showering—This Is Not an Illusion More and more people are noticing a paradoxical phenomenon: despite showering diligently every day, skin becomes progressively drier, more sensitive, and even starts flaking and itching. Switching to a "moisturizing body wash" doesn't fundamentally change this. The root cause isn't "insufficient moisturizing," but rather that showering itself is repeatedly damaging the lipid structure of the skin barrier. Understanding

A Billion-Dollar Concept Being Exploited According to 2025 data from the Beauty Industry Research Institute, amino acid shampoos now account for over 52% of category sales, with pure amino acid formulations showing significant growth. China's amino acid cleanser market exceeded 15 billion RMB in 2026, growing 25.3% . However, a gap exists between market growth and formulation integrity. 2026 industry evaluation reports explicitly note: the market still faces issues including

"Just Tweak the pH"—Is That Really Enough? Many people's understanding of cosmetic pH stops at "add some citric acid to adjust it to 5.5, and you're done." But in formulation science, this is only the beginning, not the end. "Adjusting pH" and "maintaining pH stability" are two fundamentally different things. The former is a one-time operation; the latter requires an operational buffer system—because the pH of hair & skin care products will drift during storage, fluctuate due

Why Do Ordinary Fragrances "Wash Right Off"? You've likely experienced this: a shampoo smells rich and complex in the bottle, but after rinsing, the residual scent is faint and fleeting—almost undetectable once hair is dried. Yet another product leaves a noticeable fragrance that persists all day, or even greets you when you comb your hair the next morning. The difference isn't about whether the fragrance is "expensive" or "concentrated." It's about whether the fragrance syst

What Happens Behind the "7-Day Results" You See? Claims on shampoo packaging are becoming increasingly precise: "90% dandruff reduction in 7 days," "instant smoothness after one use," "oil control extended to 72 hours after 28 days." Where do these numbers come from? What testing lies behind them? Which is more credible: "7-day" data or "28-day" data? The answers reside in a cosmetic efficacy validation system that is rapidly moving toward standardization. I. Regulatory Frame

Where Does the "Tight/Dry Feeling" Come From? After washing your face or hair, that familiar sensation of skin tightness or strand dryness—consumers call it the "tight/dry feeling." Its essence is not that "water was washed away," but rather: surfactants, while removing dirt and sebum, also dissolve and strip away the lipid barrier of the stratum corneum, accelerating transepidermal water loss (TEWL). A healthy stratum corneum maintains moisture balance via a "brick-and-morta

Separation & Precipitation: The "Barometer" of Formulation Failure A shampoo splitting into two liquid layers, an amino acid cleanser forming white crystals after sitting near a fridge in winter, or a conditioner depositing off-white granules at the bottom after standing still—these are the last things consumers and brands want to see. Yet, separation and precipitation are not random accidents. They represent a systemic failure in formulation stability. Behind every precipita

The Rinsing Paradox: Why Do Some Ingredients "Wash Away" While Others "Stay Behind"? After rinsing out conditioner or hair masks, you might assume all ingredients go down the drain. Yet, the key components that determine post-wash smoothness are precisely those that deposit during the rinsing process. This seemingly paradoxical process is driven by precise physicochemical mechanisms: cationic polymers deposit via electrostatic adsorption, silicones via emulsion breaking, and

A Confusing Experience Gap for Everyone Conditioners all promise smoothness, yet post-use experiences vary wildly: some leave hair dry and voluminous, but the smoothness vanishes instantly; others feel lubricated after rinsing, but over time hair grows heavier and stickier; and a third type starts fine, but after a month or two, hair inexplicably becomes dry and dull. These starkly different results all point to a single variable: the deposition mechanism of cationic polymers