Biotherm
Life Plankton — a thermal-spring microorganism — is the signature active, with a deep marine-based product architecture.
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The French pharmacy brand most people forget exists. Life Plankton Essence is a legitimate hero serum that's been consistently reformulated since 1952. Aquasource gel moisturizer is a classic. L'Oréal ownership has watered down the 'prestige pharmacy' positioning a bit. Still a reasonable pick for hydration-forward routines.
Strengths
- + Life Plankton has real research behind it
- + Strong hydration-focused lineup
- + Widely available globally
- + Reasonable premium-pharmacy pricing
Weaknesses
- − Brand energy has dipped in 2020s
- − Formulations less distinctive than they used to be
- − Not really a pharmacy brand — sold mostly at Sephora/department stores
The Biotherm Story
Founded in Monaco in 1952 by Jeanine Marissal and Roger Moussier, based on the discovery that thermal plankton from a Pyrenees spring had skin-regenerative properties. Acquired by L'Oréal in 1970. The Life Plankton claim is backed by published research; the brand just doesn't sell it as hard as it used to.
All Biotherm Products
4 products reviewed and rated.
Life Plankton Elixir
Biotherm's hero — a thermal-spring microorganism extract that genuinely soothes reactive skin, wrapped in a well-formulated essence.
Blue Therapy Red Algae Uplift Cream
Biotherm's Blue Therapy line harnesses marine biology — the L'Oréal-owned brand has exclusive access to Life Plankton thermal plankton research and pairs it with red algae (Chondrus crispus) extract for firming. The rosy cream texture comes from CI 17200 (Red 33) rather than actual actives, but the hyaluronic acid and squalane deliver genuine hydration, and the red algae polysaccharides provide a tightening film effect. Marine biology applied to luxury anti-aging — more substance than most prestige creams at this price.
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