Professional Treatment Sale - Kallista Institute

Summer & Winter Sales sitewide

Sales are the perfect opportunity to take care of yourself, renew your essentials, or discover new professional treatments at softer prices.

At Institut Kallista, we've chosen to treat sales as a special occasion, true to our identity: demanding treatments, renowned professional brands, and a meticulously managed shopping experience, from product selection to delivery.

During the summer and winter sales, you benefit from an exceptional discount on the entire website: Sothys, Guinot, Thalgo, LPG, Maria Galland, and Mary Cohr, all while maintaining the same quality, authenticity, and level of service.

SUMMER SALES 2026

For the summer sales 2026, we offer you a 15% discount on your entire order with the code KALSOLDES15.

Our offer is valid from Wednesday, June 24th to Tuesday, July 21st in the evening. While stocks last.

Conditions:

  • Code not applicable to products already on promotion
  • Code cannot be combined with other promotional codes (birthday or loyalty voucher)
  • Loyalty points are not accumulated throughout the sales period, whether the code is used or not.

Enjoy sales at Institut Kallista

Combine advantage and serenity by taking advantage of our sales:

  • Official professional treatments from renowned brands
  • Institute expertise in selection and advice
  • Controlled stock and authentic products
  • Free samples from €25
  • Human, available, and attentive customer service

Even during sales, we remain true to what makes us different: the quality of support and trust.

Summer and Winter Sales Conditions

During sales:

  • Offers are valid across the entire website
  • They cannot be combined with other promotional codes (birthday, loyalty) or already discounted products,
  • Orders placed during this period do not accumulate loyalty points,
  • Certain products may be available in limited quantities.

The exact conditions of current sales will always be specified on this page when they are active.

Europe Sales

Our summer and winter sales offers are available to all our customers, French and European. To ensure fairness between each country and each of our customers, you will be able to order your favorite products at an advantageous price whether from France, Belgium, Luxembourg or any other European country.

We ship all our products (excluding Sothys, only in France) throughout Europe via the UPS carrier. Delivery is fast, reliable and secure.

Institut Kallista Customer Service during sales

Even during sales periods, our team remains available to advise and assist you with your purchases.

You can contact us Monday to Friday, from 9 AM to 5 PM:

During busy periods, response, preparation, and shipping times may be slightly extended. We do our utmost to ensure that every order is handled with the greatest care.

FAQ Sales

Do the sales apply to the entire site?

Yes. During the summer and winter sales, the entire Institut Kallista site is included: Sothys, Guinot, Thalgo, LPG, Maria Galland and Mary Cohr. All categories and all brands benefit from a discount, under the conditions specified on this page.

Exclusions may apply to products already discounted.

How long does the sale last at Institut Kallista?

Sales at Institut Kallista take place over a pre-defined period , communicated directly on the website when offers are in progress.

Depending on the season and our business decisions, we don't necessarily follow official national sales dates. This flexibility allows us to offer sales at the most opportune time, while guaranteeing clear and transparent terms for our customers.

Can the sale offers be combined with other benefits?

No. Sales cannot be combined with other promotional codes, birthday offers, or loyalty benefits.

Also, loyalty points are not accumulated during this period. This rule ensures clear and fair conditions for everyone.

Are quantities limited during the sales?

Some items may be offered in limited quantities, depending on stock availability. Once stocks are depleted, the products in question are no longer available at discounted prices.

Are delivery times affected during sales periods?

Due to the high volume of orders during the sales period, order processing and shipping times may be slightly longer. However, we are doing everything we can to ensure that each order is processed carefully and promptly.

Can I contact customer service during the sales?

Of course. Our customer service team is available throughout the sales period to advise and assist you by phone, email, or online chat, during regular hours.

During this busy period, response times may be slightly longer.

Can we be delivered in Europe during the sales?

Absolutely!

During the sales, we continue to ship all our products (excluding Sothys) throughout Europe.

Summer & Winter Sales: Professional Skincare by Brand

The summer and winter sales at Institut Kallista are the ideal opportunity to find all the professional brands offered on the site , at more favorable conditions.

You can therefore take advantage of the Sothys sales , the Guinot sales , the Thalgo sales , but also the LPG sales , the Maria Galland sales or the Mary Cohr sales , on all of their available ranges.

The products offered are the same all year round: authentic skincare, actual stock levels, and careful shipping. Sales thus become a perfect opportunity to confidently refresh or complete your beauty routine.