Osavi Sodium Butyrate SR is a food supplement supplying 960 mg of microencapsulated, sustained-release sodium butyrate per two-capsule daily serving, providing 768 mg of butyric acid, in a bottle of 60 vegan capsules (30 days).

Sodium butyrate is the sodium salt of butyric acid, a short-chain fatty acid that occurs naturally in the large intestine as a product of dietary fibre fermentation by gut bacteria, and in small amounts in butter and other dairy fats. Free butyric acid has a strong, unpleasant odour and taste. Osavi microencapsulates the sodium butyrate in a cellulose-based sustained-release (SR) matrix, which neutralises the smell and taste and slows the release of the active after swallowing. This is a single-ingredient product from Osavi's Advanced line, made in Poland, with no added sugar, palm oil, gluten, lactose or soy.

Supplement Facts

* NRV (Nutrient Reference Value) not established. Ingredients: sodium butyrate, coating (hydroxypropylmethylcellulose), bulking agent (cellulose), thickener (hydroxypropylmethylcellulose), glazing agent (ethylcellulose). Butyric acid content is 80% of the sodium butyrate by weight. Each capsule contributes approximately 100 mg of sodium (about 200 mg per daily serving).

Key Features

• 480 mg sodium butyrate per capsule, delivering 384 mg butyric acid (80% by weight), stated per capsule and per serving
• Microencapsulated sustained-release (SR) form in a cellulose and ethylcellulose matrix
• Odourless and tasteless capsules: the microencapsulation masks the characteristic smell of butyric acid
• Single-ingredient formula with no added flavours, colours, sweeteners or palm oil
• HPMC vegan capsule shell; gluten free, lactose free, soy free, sugar free, non-GMO
• Made in Poland by Osavi, an EU manufacturer; Probiotic.ie is an authorised Irish retailer for Osavi
• Ships next day from Dublin by DPD, no customs charges within Ireland

How to take

Adults: take 2 capsules daily, one capsule twice a day, after a meal, with a glass of water. Swallow capsules whole; do not open, chew or crush them, as this defeats the sustained-release coating. One bottle of 60 capsules lasts 30 days at the recommended dose. Do not exceed the recommended daily dose.

Frequently Asked Questions

What is Osavi Sodium Butyrate SR?

It is a single-ingredient food supplement in hard vegan capsules. Each capsule contains 480 mg of sodium butyrate that has been microencapsulated in a sustained-release (SR) cellulose matrix. Sodium butyrate is the sodium salt of butyric acid, a four-carbon short-chain fatty acid. The bottle contains 60 capsules, which is a 30-day supply at 2 capsules per day.

How much butyric acid is in each capsule?

Each capsule contains 480 mg of sodium butyrate, which provides 384 mg of butyric acid. The daily serving of 2 capsules provides 960 mg of sodium butyrate and 768 mg of butyric acid. Butyric acid makes up 80% of sodium butyrate by weight; the remainder is sodium.

What does "SR" and "microencapsulated" mean?

SR stands for sustained release. The sodium butyrate is coated in a matrix of hydroxypropylmethylcellulose, cellulose and ethylcellulose so that it is released gradually rather than all at once after swallowing. The coating also masks the strong, rancid-butter smell and taste of free butyric acid, so the capsules are odourless and tasteless. The capsules must be swallowed whole for the coating to work.

Is sodium butyrate legal to buy in Ireland?

Yes. Sodium butyrate is sold as a food supplement across the EU, and this product is placed on the market by an EU manufacturer under EU food supplement rules. Food supplements in Ireland are overseen by the Food Safety Authority of Ireland (FSAI). No authorised EU health claim exists for butyrate, so this page makes no claim about what it does in the body. It is not a medicine and is not a substitute for any prescribed treatment.

Is it suitable for vegans and vegetarians?

Yes. The capsule shell is hydroxypropylmethylcellulose (HPMC), a plant-derived cellulose, not gelatine. The microencapsulation matrix is cellulose and ethylcellulose, and no animal-derived ingredients are listed. The product is labelled vegan by the manufacturer. It is also free from gluten, lactose, soy, added sugar and palm oil.

How do I take it and how long does a bottle last?

The manufacturer's directions are 2 capsules a day for adults, taken as one capsule twice daily after a meal with water. Swallow the capsules whole. At that dose, one bottle of 60 capsules lasts 30 days. Osavi also make a 120-capsule size, which lasts 60 days.

How much sodium is in it?

Sodium butyrate is roughly 20% sodium by weight, so each 480 mg capsule contributes about 100 mg of sodium, or about 200 mg per 2-capsule daily serving. That is equivalent to roughly 0.5 g of salt per day. If you have been advised to follow a low-sodium diet, factor this in and speak to your doctor or pharmacist before use.

Is sodium butyrate the same as BHB or "ketone salts"?

No. Sodium butyrate is the sodium salt of butyric acid, a short-chain fatty acid. BHB (beta-hydroxybutyrate) salts are a different compound used in ketone supplements and have a different chemical structure, regulatory status and purpose. Despite the similar names, they are not interchangeable. This product contains sodium butyrate only.

Are there any precautions?

This is a food supplement for adults. Do not exceed the recommended dose. If you are pregnant, breastfeeding, taking prescribed medication or under medical supervision, consult your doctor or pharmacist before use. Note the sodium content (about 200 mg per daily serving) if you are on a sodium-restricted diet. Keep out of reach of children. Not intended for children.

How is it delivered and are there customs charges?

Orders ship from our Dublin warehouse by DPD next-day delivery to addresses in the Republic of Ireland. Because the product is dispatched from within Ireland, there are no customs duties or import charges on your order. Sodium butyrate capsules do not require refrigeration; store in a cool, dry place with the lid closed.