Biotherm

Biotherm is a French skincare and bodycare company founded in 1952 and built around thermal plankton, a micro-organism the brand draws from mineral spring water [6]. It has been owned by the French personal-care group L'Oréal since 1970, where it operates as a prestige skincare label. The company remains active, selling men's, women's and body-care lines internationally and maintaining current sustainability targets.

The brand's name encodes its premise: "bio" for the biological research behind it and "therm" for the thermal springs at its origin. That focus on spring-derived plankton, which Biotherm markets as "Life Plankton", still anchors its formulas and its positioning today.

Biotherm traces its beginnings to a thermal spring in the French Pyrenees. According to the company, a young biochemist named Jeanine Marissal identified the skin affinity of the spring's thermal plankton and patented its use in skincare, establishing the brand around "products based on natural ingredients that provide effective solutions to women's problems while also being enjoyable to use" [2].

Sources differ on exactly who is credited as founder. The brand's origins page centres the story on Marissal, while a Biotherm blog post and Wikipedia attribute the original 1952 discovery of the "miraculous fountain" to Dr. Jos Jullien, a spring in which, the blog recounts, Roman soldiers once bathed to heal their wounds [4][6]. The two accounts are complementary rather than contradictory: Jullien is associated with discovering the spring, and Marissal with identifying the plankton's cosmetic application and patenting it.

The brand's stated home is also recorded two ways. Biotherm describes itself as "born in the French Pyrenees, raised in Monaco" and gives Monaco as its base [2], whereas Wikipedia situates the early operation in France, at Joyeuse in the Ardèche and the thermal springs of Molitg-les-Bains [6].

Biotherm launched in 1952 with three products: La Crème Triple-Usage, Biotherm Cure and Biomains, a hand cream that the brand still sells. Through the 1960s it widened its range into sun and slimming products, and in 1968 introduced Bio-Buste Suractive, a breast-firming cream [6].

In 1985 the company moved into men's grooming with Biotherm Homme, which it describes as the first premium men's skincare line from a beauty brand [2]. A later technical milestone came in 1994, when, after eight years of research, Biotherm scientists developed a fermentation process the brand calls Fermogénèse to extract its Life Plankton ingredient. In 2014 the actress Leighton Meester was named the brand's global spokesperson [6].

L'Oréal acquired Biotherm in 1970, and the brand has operated within the group's prestige division ever since [6]. Within L'Oréal's portfolio it sits alongside other beauty houses including Lancôme, Kiehl's, Helena Rubinstein and Vichy.

Biotherm positions itself as a science-led skincare brand centred on water and naturally derived actives, an approach it brands "Blue Biotech". The company describes Blue Biotech as its expertise "for sustainable ingredients and products that are more natural, potent and safe", framing its work as using science and technology "to amplify the power of nature" [3]. It organises this around four stated pillars — natural, potent, safe and sustainable — and uses the tagline "Live By Blue Beauty". As a prestige label, Biotherm is sold internationally across men's, women's and body-care segments.

The brand's signature active is Life Plankton, a biotechnologically cultured ingredient listed on labels as Vitreoscilla filiformis and derived from the thermal spring micro-organism at the heart of the brand's story. Biotherm presents it as the basis of its hero products, among them the Life Plankton Elixir, a serum the brand says is formulated at a 5% concentration to help "restore firmness, vitality and heal the first signs of aging" [4]. Other established lines include Blue Therapy, Aquasource and the Lait Corporel body milk, alongside the long-running Biomains hand cream.

Beyond Life Plankton, the brand's formulas draw on ingredients such as hyaluronic acid, Pro-Xylane, vitamin C and bioceramides. Biotherm states that Life Plankton is "scientifically proven to help improve skin cell renewal" and to help strengthen the skin barrier, and says the ingredient has been sustainably produced in France since 1994 [3].

Sustainability is a central part of Biotherm's public positioning, built around an initiative it calls Live By Blue Beauty spanning renewable ingredients, packaging design and ocean conservation. The company has set targets including making all of its plastic packaging refillable, rechargeable, recyclable or biodegradable and its production sites carbon-neutral by 2025, and raising biobased ingredients above 95% with more than 90% of skincare formulas biodegradable by 2030 [5]. It also states an ambition to become "Ocean Positive" by 2030.

The ocean focus dates to 2012, when Biotherm launched its Water Lovers program to fund ocean-preservation research and raise awareness of plastic pollution. Trade coverage in 2020 reported a partnership with Surfrider Foundation Europe intended to support more than 2,200 beach clean-ups across Europe, with the brand's then global president, Giulio Bergamaschi, describing action on plastic pollution as "truly critical" [7].

Biotherm remains an active brand under L'Oréal ownership. It sells its skincare and body-care lines through international e-commerce and continues to publish current sustainability commitments dated to 2025 and 2030, with established product families such as Life Plankton, Blue Therapy and Aquasource still in its range.