Betaine

What Is Betaine?

Betaine (trimethylglycine, glycine betaine; anhydrous CAS 107-43-7, hydrochloride CAS 590-46-5) is a naturally occurring zwitterion: a glycine molecule carrying three methyl groups on its nitrogen and a full positive-negative charge pair. That structure makes it at once a methyl donor and an osmolyte — two biological functions that explain nearly every commercial application. In plants it concentrates in goji berries and legumes and, above all, in sugar beet (beet molasses is the main industrial source); in animals it occurs in octopus, cuttlefish, shrimp and other mollusks, and in the liver, spleen and amniotic fluid of vertebrates including humans.

Natural Occurrence and Industrial Production

Commercial betaine follows two routes. Extraction from beet molasses — chromatographic separation of the betaine fraction during sugar refining — yields natural-status material preferred by premium feed and food buyers. Synthesis from trimethylamine and chloroacetic acid (mono- or two-step) supplies consistent volume at controlled cost; the product is chemically identical. Downstream finishing decides the grade: anhydrous crystallization yields 99% anhydrous betaine; acidification and crystallization yield 98% betaine hydrochloride; dissolution yields liquid grades.

The Two Functions That Drive Value

Function One: Methyl Donation

Betaine donates one of its three methyl groups to remethylate homocysteine into methionine, sparing dietary methionine and supporting the methionine cycle that synthesizes creatine, phosphatidylcholine and DNA methylation. In poultry, swine and aquaculture this translates into feed-cost savings (partial methionine replacement), improved growth consistency and support during periods of high methyl demand such as fast growth or heat stress.

Function Two: Osmoprotection

As a compatible osmolyte, betaine accumulates inside cells without disturbing metabolism and stabilizes proteins and membranes against osmotic shock, dehydration and heat. Poultry under heat stress, shrimp in salinity-swung ponds, and fish in transport all perform measurably better with betaine in the diet — the reason aquaculture is one of the fastest-growing segments.

Grade Classification

• Betaine hydrochloride 98% — the standard feed-grade methyl donor; cost-effective, free-flowing micro-granule.
• Anhydrous betaine 99% — for daily-chemical, food-grade and pharmaceutical applications where chloride and moisture must be minimal.
• Liquid betaine (typically 35–47% solutions) — for liquid feed, fermentation dosing and formulation convenience.

Applications by Industry

Poultry

Betaine supports methionine economy, lean-meat deposition and heat-stress resilience in broilers and layers; typical inclusion 0.5–1.5 kg/ton of complete feed, structured with the nutritionist according to methionine pricing and climate.

Swine

In piglets and finishers betaine improves feed conversion and carcass lean percentage and helps during heat and transport stress — a documented methyl-donor and osmolyte double effect.

Aquaculture

Shrimp and fish diets use betaine for osmoregulation in salinity-variable ponds, for methyl support during rapid growth, and as a feeding attractant that improves intake of vegetable-protein-based diets.

Ruminants

Dairy and beef cattle benefit from rumen-protected and free betaine during transition periods, supporting liver function and dry-matter intake under metabolic load.

Fermentation Industry

As an osmoprotectant, betaine raises microbial tolerance in high-osmolarity broths — amino-acid and antibiotic fermentations dose it to sustain productivity where salt and substrate concentrations would otherwise stall cells.

Agriculture

Foliar-applied betaine acts as an osmoregulator supporting crops through salinity, drought and heat episodes — a growing use in stress-climate agriculture.

Food, Cosmetics and Pharma

Anhydrous food-grade betaine appears in functional beverages and supplements; in cosmetics it functions as a humectant and soothing osmolyte, and the wider betaine family — cocamidopropyl betaine and ester-type amphoterics — provides mild surfactancy (compare the anionic side described in our SLES article). Pharmaceutical use covers hepatic-support formulations and excipient roles.

Betaine in Animal Metabolism: the Practical Detail

Two metabolic effects carry the commercial weight. In the methionine cycle, betaine — via betaine-homocysteine methyltransferase, concentrated in liver and kidney — remethylates homocysteine, regenerating methionine and enabling the downstream syntheses (creatine for energy metabolism, phosphatidylcholine for liver fat transport, universal methylation reactions). Practically: part of dietary methionine can be displaced, and during high-load phases (fast growth, peak lay, transition cows) the methyl economy shows measurable benefit. In osmoregulation, betaine accumulates in intestinal cells, kidney medulla and other osmotically stressed tissues, protecting water balance and enzyme function during heat stress and salinity change — the mechanism behind broiler heat-stress trials and shrimp salinity-trial results that built betaine’s aquaculture reputation.

Betaine vs Choline vs Methionine: the Economics

Choline chloride is the cheap methyl donor but with conversion overhead (choline must first become betaine to donate methyls efficiently) and hygroscopic handling problems in premixes; betaine skips that step. Methionine is the expensive direct route — also an essential amino acid with its own growth function beyond methyls. The working economics: betaine substitutes a fraction of added methionine (the methyl-equivalent share) at favorable cost, while choline programs upgrade to betaine for efficiency and premix stability. Nutritionists compute the crossover monthly against ingredient prices; suppliers who document assay consistently make that calculation trustworthy.

Premix and Formulation Practice

Betaine hydrochloride micro-granules flow and mix cleanly into vitamin-mineral premixes; anhydrous betaine asks for dry-line handling in humid climates. Both are stable through pelleting temperatures. Liquid betaine integrates into liquid-feed and fermentation dosing systems. The classic caution is storage humidity — hydrochloride cakes when abused, so lined bags, pallet protection and first-in-first-out are the standing instructions. Compatibility with organic acids and standard enzymes in premix matrices is well established.

Quality Analysis and Fraud Checks

Assay runs by titration or HPLC; identity by IR; moisture, chlorides, heavy metals and residual trimethylamine distinguish serious producers. The fraud pattern to know: betaine hydrochloride sold on anhydrous-equivalent assay — roughly 15% difference — which quietly short-changes a feed formula. The defense is a COA that states the chemical form, the assay basis and the method; any ambiguity gets one clarifying question before contracting. EastChem certifies form and method on every lot precisely so formulation math survives audit.

Dosing Across Species: a Compact Reference

Field practice concentrates into a few ranges: broiler and layer complete feeds typically carry 0.5–1.5 kg betaine per ton; swine diets 0.5–2 kg depending on stage and stress; shrimp and marine fish feeds 1–3 kg reflecting osmoregulatory load; ruminant supplementation runs 10–30 g per head per day in transition programs. Fermentation broths dose by osmolarity target rather than percent, typically 0.1–1 g/L. These starting ranges are refined against methionine prices, climate and performance data by the nutritionist of record — the numbers above are the field center of gravity, not a substitute for formulation.

Packaging Programs for Different Buyers

Feed-mill buyers move 25 kg bags on pallets with jumbo bags cutting handling on high-volume lines; fermentation and food buyers often prefer smaller certified lots for lot-control reasons; traders consolidate mixed containers with glycols and alcohols. Whatever the profile, the discipline is identical: lined, sealed packaging; dry warehousing; and a COA that names the chemical form. EastChem ships within 7–15 days on standard programs with samples in about 2 days, and MOQ at one 20-foot container keeps the logistics economical for regional distributors and direct feed mills alike.

Packaging, Handling and Supply

25 kg bags with liner (feed and food grades), jumbo bags on request; typical shipping 7–15 days. Store dry and sealed — both grades are hygroscopic to a degree, and hydrochloride in particular must stay dry to protect flowability. Per-batch COA covers assay, moisture, heavy metals and, for feed use, the trace parameters feed regulations expect. Nineteen years of chemical manufacturing across three subsidiaries stand behind supply; MOQ one 20-foot container, samples about 2 days, T/T or L/C.

About this guide: dosing ranges and nutrition commentary summarize field practice for orientation; final feed formulation belongs to the nutritionist of record under local feed regulations. Dosing references, economics commentary and quality checks reflect current field practice and our certified specifications. Feed mills, premixers, fermentation plants and distributors can request the complete form-and-method documentation, seasonal volume programs, and consolidation options that ship betaine alongside glycols, alcohols and the wider EastChem catalog in one container. For nutrition teams trialing betaine for the first time, the standard path is a parallel feeding study against the current methionine program over one growth cycle, with our documentation providing the assay certainty that makes the comparison meaningful — after which most programs keep betaine permanently as both the economic and the resilience choice. Assay-method notes and form specifications accompany every quotation by default, and the technical desk confirms dosing questions within the working day. Regional stocking programs shorten lead times for repeat buyers on standing schedules, and sample lots ship with the same documentation as contract volumes.

Contact for quotations and samples:
Carrie Sun
TEL / WhatsApp: +86 183 5460 8228
Email: Carrie@dyeastchem.com