Organic Birch Sap Lacto-fermented | Probiotics
Plage de prix : 39,00 € à 59,00 €
Birch sap from the Bouquetot eco-domain, left to naturally ferment for 6 months — without added yeasts, without chemical intervention.
A living, lightly sparkling drink with properties Probiotics Available all year round.
– Deeply strengthened gut flora, course after course
A gentle and continuous natural drainage of the liver and kidneys
– Improved joint comfort — the specific effect of lacto-fermentation
– A remineralisation with calcium, magnesium, potassium and silica
– The slightly tart and fizzy taste of natural forest kefir
⭐⭐⭐⭐⭐ «A treatment that did me a world of good!»
Delphine H. Verified review · Published on 01/11/2025
🌿 Organic · Harvested in Normandy · Available all year round · Free delivery for orders over €85
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Free delivery on orders over €85
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Natural fermented drink: live probiotics, drainage and joint comfort
What is Lacto-fermented Birch Sap – how is it different from fresh sap?
At the heart of the Bouquetot eco-estate, in the Pays d’Auge region, our birch trees yield their sap each spring for 3 to 4 weeks. This is the same sap that goes into our Fresh Sap – pure, raw, untreated, and harvested by hand.
But here, the sap doesn't stop at harvest time. At Akal, we let it live.
For 6 months, at low temperatures, without added yeasts or chemical intervention, the birch sap slowly transforms. The micro-organisms naturally present in the sap – lactic acid bacteria – multiply, consume the natural sugars, and produce lactic acids, live probiotics, and compounds that the fresh sap did not yet contain.
This process is lacto-fermentation. The same transformation that produces kefir, kombucha, sauerkraut. Except here, the raw ingredient is organic birch sap, harvested in a Norman forest.
The result: a lightly sparkling drink, with tart and lively notes, possessing different and complementary properties to fresh sap. It is not simply preserved sap – it is transformed, enriched sap, whose effects on gut flora and joint comfort are specific to fermentation.
And unlike fresh sap – available only from the end of February to the end of March – lactofermented sap is available all year round. It is the alternative for those who missed the season, and the ally of those who want to maintain the effects of spring drainage all year long.
What she does — and what she doesn't do
What she's doing
– To enrich the gut flora with live probiotics, for the duration of a one-month course
– Gently cleanse the liver and kidneys throughout the year, without seasonal urgency
– Supports joint comfort — a specific effect of lacto-fermentation, absent from fresh sap
What she doesn't do
– Reproduce the exact effects of fresh sap — the two are complementary, not identical
– To act within a few days – a 3 to 4 week course is necessary for lasting effects
– To substitute for medical monitoring in the case of diagnosed joint or intestinal pathology
The 5 benefits — and for whom
Microbiome and gut flora
Lacto-fermentation produces live lactic acid bacteria – the same ones found in kefir or kombucha, but derived from Norman forest sap. These natural probiotics help to rebalance the gut flora, improve daily digestion, and reduce recurring digestive discomfort – such as bloating, irregular transit, and feelings of heaviness after meals. The effects gradually establish themselves over the course of the treatment.
Ideal profile: Individuals with irregular bowel movements, those who have recently taken antibiotics and are looking to rebalance their gut flora, and people prone to bloating or digestive discomfort after meals.
2. Gentle and continuous drainage
Birch sap – even lacto-fermented – retains the natural minerals and draining compounds of the birch. It helps to gently support the body's natural elimination pathways, particularly the liver and kidneys, without the intensity of a short spring cleanse. A background drain, which integrates into a daily ritual without seasonal constraints.
Ideal profile: People who have missed the fresh sap season and still wish to do an annual cleanse, people looking for gentle, long-term liver and kidney support.
3. Joint comfort — the specific effect of lacto-fermentation
This is the differentiating effect of lacto-fermented sap compared to fresh sap. Fermentation produces compounds – notably organic acids – which act on underlying joint inflammation. People suffering from morning stiffness, mild knee or hip pain, or joint discomfort related to age or sport are often the ones who talk about it the most after a month-long course. Research into these mechanisms is ongoing, but feedback from our customers on this point is regular.
Ideal profile: Seniors looking to maintain joint suppleness, athletes subjected to repeated mechanical stress, people with persistent morning stiffness.
4. Natural remineralisation throughout the year
Lacto-fermented sap retains the mineral profile of fresh sap – calcium, magnesium, potassium, silica, manganese – in a state transformed by fermentation, rendering some minerals more available to the body. A natural way to supplement your daily mineral intake without synthetic supplements, whatever the season.
Ideal profile: Individuals with mineral deficiencies, vegetarians or vegans seeking natural sources of calcium and magnesium, seniors whose digestive absorption decreases with age.
5. Sustained immunity — autumn and winter cure
The combination of live probiotics, minerals and birch extracts supports the body’s natural defences. A 25-day course of treatment in September, as autumn approaches, helps the body face the winter with a stronger gut flora — bearing in mind that over 70% of the immune system is linked to the gut.
Ideal profile: Individuals often feeling run down in autumn, families looking for natural immune support without pills or capsules, people wanting to complement their IMMUNITY Potion with foundational probiotic action.
How to incorporate lacto-fermented sap into your daily life?
The standard protocol: 200ml per day, taken in the morning on an empty stomach, 20 to 30 minutes before breakfast. The 5L container covers exactly 25 days at this dosage.
However, at room temperature – take the can out of the fridge 30 minutes beforehand. The natural fizz and slightly tangy taste come through better at room temperature than when cold. Or diluted in organic Norman apple juice for those trying the taste for the first time.
The white film, the deposit, the slight fizzing: signs of quality, not defects. Fermented birch sap is a living drink. A white film, a slight sediment, or a slightly puffed-up package mean that the lactic acid bacteria are active – this is exactly what we are looking for. Shake gently before serving, open carefully.
Dosages according to your objective
| Objective | Quantity / day | Fake 3L capacity | 5L spurious duration |
|---|---|---|---|
| Digestive discovery / sensitivity | 100ml | Around 30 days | ~50 days |
| Standard cure (recommended) | 200ml | About 15 days | 25 days |
| Intensive Cure | 250 to 300ml | 10 to 12 days | 17 to 20 days |
Treatment protocol — what happens week by week
Week 1
The body encounters sap probiotics. For individuals with sensitive gut flora, the initial days may be accompanied by slightly more active digestion – this is a sign that the flora is reorganising. Start with 100ml if you are sensitive, and increase gradually.
Week 2
Digestion becomes more fluid. Daily digestive discomforts start to ease. The first feelings of lightness after meals begin to appear.
Weeks 3 and 4
The effects on the flora have taken hold. Deep drainage has become a daily occurrence. For people seeking joint support, the first differences generally start to be felt from the third week onwards.
25 days is the minimum for a probiotic treatment to work deeply on the gut flora. The 5L container is perfectly suited for this cycle.
Precautions for use
– People undergoing medical treatment – particularly those on immunosuppressants: consult your doctor before starting
– People with severe inflammatory bowel disease (Crohn's, Ulcerative Colitis): seek your doctor's advice
– Pregnancy and breastfeeding: as a precaution, consult your doctor
– Severe kidney or liver disease: consult your doctor
– Conservation: Refrigerator · Consume within 3 weeks of opening
A white veil, sediment, or slight fizz are normal – living beverage, not a defect
Which format should I choose?
3L — €39.80 — 15-day course at 200ml/day
The format for discovering lacto-fermented sap for the first time, or for a short, targeted course. Also ideal for topping up a fresh spring sap cure, or for testing your tolerance to probiotics before investing in the large format.
5L — €59.80 — complete 25-day course ⭐ recommended format
The format engineered for the standard Akal cure — 25 days at 200ml per day, without interruption. This is the necessary duration for the probiotics to truly act on the gut flora and for the joint effects to begin to take hold. Free delivery is included from the start.
The recommended synergies
💙 Lactofermented Sap + Organic Phycocyanin — the anti-inflammatory synergy
The lacto-fermented sap drains and supports the joints through its fermentation compounds. Phycocyanin protects cells and acts on underlying inflammation with its antioxidant active ingredients. Together — 200ml of sap in the morning, 10ml of Phycocyanin in a glass — they form the most complete duo for joint comfort and cellular vitality, available all year round. This is the anti-inflammatory synergy of the Akal range.
🌿 Lacto-fermented Sap + DETOX Potion — deep purification synergy
The lacto-fermented sap works on the microbiota and gentle drainage. The DETOX Potion supports the liver with its spirulina-chlorella-nettle-dandelion synergy. The two act on complementary organs – intestinal flora and the liver – and mutually reinforce each other over a one-month course.
🌱 Fresh Sap (March) → Lacto-fermented Sap (April-December) — the annual sequence
Fresh sap in March for intense purification and spring re-mineralisation. Lacto-fermented sap the rest of the year to maintain gut flora, joint comfort and gentle drainage. The complete sequence for those who have integrated birch sap into their annual ritual.
🛡 Fermented Sap + IMMUNITY Potion — the complete autumn cure
Sap probiotics to strengthen gut flora. Spirulina, acerola, nettle and ginger in the IMMUNITY Potion for active immune support. The September protocol – 25 days before winter to deeply prepare the body.
Ingredients: 100% Birch sap (Betula pendula) — no additives, no preservatives, untreated.
✅ Hand-harvested from the Bouquetot eco-estate, Pays d'Auge, Normandy
✅ Raw and living — unpasteurised, unfiltered, untreated
✅ Lightly sparkling naturally — the fizz is proof of active fermentation
✅ Available all year round — unlike fresh sap (3 to 4 weeks per year)
What is the difference between fresh sap and lacto-fermented sap?
The fresh variety is raw and alive in its natural state — draining, remineralising, revitalising — only available for 3 to 4 weeks a year in March. The lacto-fermented variety comes from a natural 6-month fermentation process — it develops active probiotics and a joint-supportive effect inherent to fermentation, and is available all year round. Both are complementary: the fresh for the big spring cleanse, the lacto-fermented for continuous maintenance.
Does the taste of fermented sap resemble that of kombucha?
Yes – slightly tart, effervescent, with a distinct vegetal freshness. It’s smoother than classic kombucha, less sweet, with a clean mineral undertone from the birch. Most of our customers who enjoy kefir or fermented drinks take to it easily. For those new to the taste, diluting it in organic apple juice for the first few days helps.
Is the white film at the bottom of the container normal?
Yes — this is a sign of active fermentation and live lactic acid bacteria. This is exactly what we look for in a craft lacto-fermented beverage. Gently shake before serving. A slightly puffed-up package is also normal for the same reason — open carefully over a glass.
Can lacto-fermented sap be taken if one is lactose intolerant?
Lactofermentation produces lactic acid bacteria – but the term «lacto» refers to lactic acid, not lactose. This sap does not contain lactose. It is naturally suited to lactose-intolerant individuals.
How long does it take to feel the effects on digestion?
The first effects on transit and digestive discomfort are generally noticeable from the end of the first week. For effects on the intestinal flora and joint comfort, a course of 25 days at 200ml/day is the minimum for established results.
Can several courses be done in a year?
Yes – two to three courses per year is a consistent frequency for maintaining gut flora and joint comfort. Many of our customers undertake an autumn course (September), a winter course (January), and then follow on with fresh sap in March.
How to store the canister after opening?
In the refrigerator, well sealed. Consume within 3 weeks of opening. Remove the daily portion 30 minutes before drinking – lacto-fermented sap is better at room temperature than straight from the fridge.
