About Dr. Sam Ellis

Dr. Samantha Ellis is a board-certified medical and cosmetic dermatologist based in Danville, California.

She is widely known for her informative YouTube channel, where she breaks down complex skincare science into easy-to-understand advice.

Alongside her clinical practice, she’s the founder of Prequel Skin, a dermatologist-developed skincare line focused on affordable, barrier-first products.

Early Life and Education

Dr. Ellis graduated summa cum laude in Biology from UCLA. She earned her M.D. from the University of Michigan Medical School and was inducted into the Alpha Omega Alpha Honor Medical Society for academic excellence.

She completed her internship in Denver and her dermatology residency at UC Davis, where she now also serves as a Clinical Instructor.

How She Started

During the COVID-19 pandemic, when her clinic was temporarily shut down, Dr. Ellis began addressing patients’ frequently asked skincare questions through short videos on Instagram.

This quickly evolved into the creation of her YouTube channel, Dr Sam Ellis, where she could explain topics in greater depth.

Her content focused on everyday skincare issues, myths, product breakdowns, and ingredient science—all backed by clinical experience.

Current Business: Prequel Skin

In 2023, Dr. Ellis launched Prequel Skin, a direct-to-consumer skincare brand. The mission behind Prequel is to provide “basic-plus” skincare: simple, science-backed products that go beyond the basics without being overpriced.

The product line is designed for people with sensitive or compromised skin barriers, such as those dealing with eczema, dryness, or rosacea.

The brand emphasizes transparency, affordability, and dermatologist-approved formulations.

Prequel Skin products include:

• Barrier Therapy Moisturizer

• Rebound Serum

• Gentle Cream Cleanser

• Cicaprotect Ointment

The brand has gained rapid popularity due to its focus on ingredients, accessibility, and Dr. Ellis’s trusted clinical background.

Social Media and Reach

Instagram

Dr. Ellis maintains an active online presence across multiple platforms:

• YouTube: Over 336,000 subscribers

• Instagram: Over 220,000 followers

• TikTok: Over 120,000 followers

Her YouTube content includes:

• Skincare routines for different age groups

• Anti-aging strategies

• Sunscreen myth-busting

• Ingredient reviews (like niacinamide, retinol, and AHAs)

• Patient Q&A-style videos based on real dermatology consultations

Net Worth (Estimated)

• As of 2024, her estimated net worth is between $500K–$2 million, from:

  • Her dermatology practice

  • YouTube ad revenue

  • Her skincare brand (Prequel)