Hey there,
The Biotherm Aquasource Deep Serum is thought to deeply hydrate the skin and give it more glow. More than that, it has to stimulate the natural skin cell regeneration.
The description of the product on the Internet:
A GLOWING SKIN STARTS WITH INTENSE HYDRATION* The precious bath of the exclusive Life Plankton, rich in 35 nutrients, demonstrates incredible properties. For its 1st time, BIOTHERM biologists have managed to concentrate it 3X more than in Aquasource Gel and associate it with mannose, known for its hydrating properties, in Aquasource Serum. This elixir is able to promote the birth of a new skin quality. Skin looks luminous, as if light created from within.
I got a sample of this product with 7 ml. The bottle is made of plastic and has a dropper for a more convenient way to get the product out.
The serum has a gel-like texture with a pearly glow. It doesn’t bleed or flow. It absorbs quickly but I can feel a tacky feeling for a few minutes after application. It disappears after a while, however, so as a result my skin is only gentle and silky smooth.
The serum works immediately after applying.
It smells like saltwater and reminds me of a sea 
The scent is somewhat salty and spicy.
Right off the bat, I have dry and picky skin prone to all kinds of issues like redness and flakey bits. Also, it reacts to heavy makeup very clearly. But it works really fine with this Biotherm serum.
It goes a pretty long way. More than that it distributes on my face easily and soaks in quickly.
After the stickiness disappears, I have a slightly cooling sensation and my skin feels really comfortable. The serum didn’t cause anything at some damaged skin areas.
On top I prefer applying the Aquasource gel for normal to combination skin type and then only a foundation.
The foundation applies to my skin really well. No oily sheen is noticeable throughout the day. After applying my skin looks luminous due to some particles present in the serum for real.
By the way, my skin doesn’t look any worse after washing the product off.
All in all I’m pleased with the results after 2 weeks of use. My skin is refreshed, hydrated, really glowing and healthy-looking. This is the real aquasource for my skin and I’d like to repurchase a full-size tube now.
It’s the holy grail for dry skin in the summertime.
