A seven-day course to reset dehydrated skin
Thalgo Source Marine 7 Day Hydration Treatment is a seven-day course of single-dose ampoules for dehydrated skin, meant as an intensive kick-start before settling into a daily routine, or as a seasonal boost. Each vial concentrates the Source Marine range's sève bleue des océans and alginate complex, delivering a full week of intensive hydration.
How it works
A fluid, fast-absorbing concentrate in single-dose vials, one for each day of the course.
Who it suits
- Dehydrated skin that needs a fast, visible reset
- A seasonal hydration boost, for example after sun or heating
- Anyone trying the Source Marine range for the first time
- Travel, thanks to the individual daily vials
Worth knowing before you buy: the formula contains fragrance. Use one vial per day for the full seven days for the intended effect.
Complete the routine

Hydrating Melting Cream
Continue with this cream once the course is finished.
Shop →
Rehydrating Pro Mask
A weekly mask to keep results going afterwards.
Shop →Characteristics
- Texture: fluid concentrate, single-dose vials
- Skin type: dehydrated skin
- Skin concerns: tightness, dehydration lines
- When to apply: one vial daily for 7 days, morning and/or evening
- Main benefits: fast, intensive rehydration
How to use
Snap open one vial and apply the full contents to cleansed face and neck. Use one vial a day for seven consecutive days.
Active ingredients
- Sève bleue des océans: concentrated daily hydration
- Alginates: progressive hydration release
Manufacturer information
Brand: BLC Thalgo Cosmetic S.A.
Address: Domaine des Châtaigniers, 83520 Roquebrune-sur-Argens, France
EAN: 3525801682752
