About Celtic Spa Skincare

Name: Celtic Spa Skincare
Address: US
Price range: $$

Where Expertise Meets Exceptional Skin

Celtic Spa Skincare was born from a simple belief: the best skincare doesn't happen by accident. It happens when clinical knowledge, proven ingredients, and genuine care for your skin come together.

Celtic Spa Skincare is an authorized Environ® retailer, supplying 100% authentic Environ products directly to customers in the United States.

Important: Consultation Required for Environ® Products

Due to the active nature of the ingredients within the Environ® range, a consultation is required to establish the most suitable skincare products for you. Authorizing the sale of any Environ products is mandatory — without this we are unable to process your order.

We provide free consultations to establish the most appropriate skincare regime from the Environ range. Consultations usually take just a few minutes, but we are happy to provide you with as little or as much information as you may require. Please contact us at 617-777-0026 or hello@celticspaskincare.com to arrange a call-back at your earliest convenience.

Please note: if we are unable to verify the status of your order within 7 days of purchase, it will be canceled and refunded.

Our Story

Celtic Spa has built its reputation as a trusted destination for results-driven skin treatments. What began as a commitment to delivering real, visible outcomes in the treatment room has grown into a carefully curated retail skincare offering — bringing the same clinical standards home with you.

Every product we carry has been selected, tested, and trusted by our therapists. If it's on our shelves, it's because we've seen it work.

Our Philosophy: Ingredient-Led Skincare

We believe in the science of skin. Our product lines are anchored in active, evidence-based ingredients:

Vitamin A — the cornerstone of the Environ philosophy. We use cosmetic Vitamin A esters (retinyl acetate and retinyl palmitate) that work with your skin's natural biology to support cell renewal, improve skin texture, and deliver long-term results. Introduced gradually through Environ's structured STEP-UP system so your skin adapts safely and effectively.
Alpha Hydroxy Acids (AHAs) & Beta Hydroxy Acids (BHAs) — exfoliants that refine texture, improve clarity, and prepare the skin to absorb active ingredients more efficiently.
Vitamin C — a powerful antioxidant that brightens, protects against environmental damage, and supports collagen synthesis for firmer, more luminous skin.

We don't believe in shortcuts or filler ingredients. Every formulation we recommend is chosen for its efficacy, safety profile, and ability to deliver lasting change.

From the Treatment Room to Your Home

Our spa treatments and retail skincare lines are designed to work together. The protocols we use in-clinic are the same principles we apply when building your at-home routine — because great skin is a daily practice, not just a monthly appointment.

Our therapists are trained to assess your skin, understand your goals, and guide you through a personalized regimen that evolves with your skin. Whether you're starting your skincare journey or refining your routine, we're here to support you every step of the way.

"Celtic Spa and Laser Services recommended this product to me and it has drastically changed my skin."
— Verified Customer, ★★★★★

Trusted by Our Community

The trust our clients place in us is something we take seriously. Our recommendations are grounded in clinical training, ongoing education, and a genuine passion for skin health — not trends or marketing claims.

When you shop with Celtic Spa Skincare, you're not just buying a product. You're accessing the same expertise our spa clients have relied on for years.

Meet the Founder

Kate Thornton — Licensed Esthetician & Environ® Authorized Stockist

Kate founded Celtic Spa Skincare with one mission: to bring science-backed, vitamin A-led skincare to clients who are serious about results. With years of hands-on spa experience and specialist training in Environ's protocols, Kate curates every product in the Celtic Spa range with expert precision.

As an authorized Environ® stockist, Kate offers personalized guidance to help you find the right products for your skin — whether you're starting your Vitamin A journey or advancing through the AVST step-up system.

Have a question about your skin? Contact us directly →