What your skin is actually telling you.
Evidence-based articles on skin science, ingredients, sleep, and what your tracking data actually means.
Why Does My Skin Look Worse After a Bad Night's Sleep?
One poor night of sleep can temporarily increase inflammation, disrupt barrier repair, and alter fluid balance. Here's what's actually happening, and how to tell the difference between noise and signal.
Dr. Alice Rudd·7 min read·14 February 2026
Can Stress Cause Breakouts? Understanding WHOOP Stress Scores and Skin
Stress can temporarily increase inflammatory signalling and oil production, which may make breakouts more visible or more inflamed. It rarely creates acne instantly or causes permanent structural damage.
Dr. Alice Rudd·6 min read·14 February 2026
Is "Ozempic Face" Real? Understanding Weight Loss–Related Facial Change
"Ozempic face" describes visible facial changes during weight loss. The pattern being labelled is real, but the attribution is often misunderstood. Here's what's actually happening.
Dr. Alice Rudd·8 min read·14 February 2026
Skin Metrics: Clarity & Breakouts
Clear skin isn't just about whether you're breaking out today. Stella tracks clarity across multiple signals, from pore visibility to healing speed, to show what's happening both above and below the surface.
Dr. Alice Rudd·5 min read·6 November 2025
Skin Metrics: Tone & Pigmentation
Even skin tone isn't about "perfect" skin, it's about understanding how your skin responds to light, heat, hormones and inflammation. Pigmentation patterns tell a story about your skin's history and how it adapts.
Dr. Alice Rudd·5 min read·6 November 2025
Skin Metrics: Skin Sensitivity
Skin sensitivity is your skin's ability to stay balanced when life happens. Sensitivity isn't a "type." It's a pattern that can shift with stress, weather, products and sleep.
Dr. Alice Rudd·4 min read·6 November 2025
Skin Metrics: Aging & Structure
Aging doesn't happen all at once. It shows up in stages, some subtle, some structural, and each area of the face changes at its own pace. Stella tracks seven key markers to help you understand your unique aging pattern.
Dr. Alice Rudd·5 min read·6 November 2025
Skin Metrics: Eye Area
The eye area is one of the first places to show change. The skin here is thinner, has fewer oil glands, and reflects lifestyle patterns easily, sleep, stress, hydration, screens, and time.
Dr. Alice Rudd·4 min read·6 November 2025
Skin Metrics: Your Skin's Baseline Properties
Some parts of your skin are dynamic, they change with stress, sleep, hormones and weather. But other characteristics stay relatively steady over time. These are your baseline properties. Knowing them helps you choose products that support your skin, instead of working against it.
Dr. Alice Rudd·5 min read·6 November 2025