Fermented Birch Sap Blackcurrant - organic

🌳 A combination rooted in European tradition

Birch sap has accompanied the people of Northern Europe, the Baltic countries, Central Europe and the forested regions of France for centuries. Blackcurrant, for its part, is a traditional plant of the French countryside, whose buds have been prepared as a macerate since the 20th century. Frankly, combining the two follows the same logic: picking the plant at spring bud burst.

🌳 Lacto-fermentation, an ancestral process

During the natural fermentation of fresh sap, the plant sugars are transformed by the naturally present lactic ferments. It is this process that gives fermented birch sap its slightly tangy taste and allows it to keep at room temperature, without pasteurisation. The lactic acid produced naturally during this fermentation is the same as that found in sauerkraut, kefir or lacto-fermented vegetables - a family of living foods we have been championing at Biovie since 2007.

🌳 Blackcurrant bud, a traditional macerate

Blackcurrant bud (Ribes nigrum) macerate is obtained by macerating freshly picked young buds in a mixture of water, alcohol and vegetable glycerine - the traditional method for bud macerates. In this sap, it is only a small proportion of the finished product (the macerate contains about 0.03% residual alcohol once diluted in the sap): the bulk of the volume remains the birch sap itself.

🌳 A composition that comes from the tree, the soil and the undergrowth

Birch sap is naturally made up of plant water, simple sugars, organic acids and minerals from the soil the tree's roots reach into. The Plateau de Sault, at 900 m of altitude in the Cathar Pyrenees, offers a preserved terroir, far from the large agricultural plains and industrial pollution - the same terroir where the blackcurrant bushes that supply the buds for the macerate are grown.

La Sève Cathare: PROBIOSEVE®

The small team at La Sève Cathare began harvesting birch sap in 2011 on the Plateau de Sault at 900 m of altitude in wild Pyrenean forests preserved from chemical or electromagnetic pollution. The blackcurrant bushes that supply the buds for the macerate are grown and harvested on the same site, by the same team.
The trees are consulted and thanked during the harvest for their generosity and for sharing their precious nectar. La Sève Cathare works with respect and care towards the trees to offer a product of great quality.

Best before: 31/12/2026

Composition : organic fermented birch sap and organic blackcurrant bud mother macerate (glycerine, water, alcohol, buds), from the Plateau de Sault (Cathar Pyrenees, Occitanie). Unpasteurised, no preservatives.

Indicative nutritional values of birch sap (per 100 ml):

• Water : about 98%
• Energy value : in the region of 20 kcal per 100 ml
• Simple sugars (glucose, fructose): about 0.6 to 1.1 g per 100 ml
• Minerals : calcium, magnesium, potassium, silicon - contents naturally vary depending on the terroir, climate and harvest season
• Amino acids : up to 17 amino acids identified in birch sap, including asparagine, glutamine, arginine, serine and glycine

⚠️ Indicative values, taken from the available literature on birch sap and not from a laboratory analysis specific to this batch. They do not take into account the blackcurrant bud macerate, present in a small proportion in the finished product.

Packaging : 3 L bag-in-box. Pouring tap included. The bag-in-box is specifically designed to prevent air from entering the pouch when serving, which keeps the sap fresh for several weeks after opening.

How to store : at room temperature, before and after opening (no need to refrigerate, as the sap is already lacto-fermented and naturally stable).

Serving suggestion : a small glass of about 15 cl in the morning, preferably on an empty stomach, in springtime. The 3 L bag-in-box gives about 20 servings for one person.

Precautions for use : this fermented drink is naturally non-alcoholic and suitable for most adults; it does however contain a trace of residual alcohol (about 0.03%) from the blackcurrant bud macerate. As a precaution, we recommend seeking medical advice beforehand in the following cases: children under 7, pregnant or breastfeeding women, people allergic to salicylate derivatives (aspirin), people on anticoagulants, antidiabetic treatment or immunosuppressive treatment, people with kidney conditions. For more details, see our article on contraindications and precautions for birch sap.

Regulatory information : this product is a food. It is neither a medicine nor a food supplement. In accordance with Regulation (EC) No 1924/2006, no therapeutic claim is associated with fermented birch sap or blackcurrant bud. A varied and balanced diet and a healthy lifestyle are the basis of good health.

Frequently asked questions

The information presented on this product sheet is provided for information purposes only and does not constitute medical advice. Consult a health professional before making any changes to your diet or if you are undergoing treatment.

Updated: September 2026. Product selected and validated by Éric Viard, founder of Biovie and ISTOM, co-author of Algues au quotidien (Gallimard, 2024) - Best cookbook in the world, Gourmand Cookbook Awards 2025, and Best cookbook in France, Académie Nationale de Cuisine 2025.