Bulk Stevia Extract Supplier — Stevioside, Rebaudioside A & Reb M, Conventional & Organic Grades, B2B Wholesale
Valeherb is a bulk stevia extract manufacturer and wholesale supplier of rebaudioside A and rebaudioside M powder across the full purity spectrum — from 80% total steviol glycosides to 98% Rebaudioside A and 95% Rebaudioside M (Reb M) — in both conventional and certified-organic grades, with custom glycoside profiles available for food and beverage, nutraceutical, pharmaceutical, and dietary supplement formulation. Derived from the dried leaves of Stevia rebaudiana Bertoni, standardized stevia extract is one of the most globally regulated natural high-intensity sweeteners and a plant-derived alternative to synthetic sweeteners such as sucralose — holding FDA GRAS status, EU authorization, JECFA evaluation, and regulatory approvals across 60+ countries. The critical procurement decision is not simply purity — it is which steviol glycoside is standardized, as stevioside, Rebaudioside A, and Rebaudioside M have meaningfully different sensory and stability profiles that determine application suitability.
Rebaudioside A vs. Rebaudioside M: The Distinction Every Formulator Must Know
Stevia rebaudiana leaves contain over 30 steviol glycosides, but only a few matter commercially. Stevioside is the most abundant in the leaf (5–10% dry weight), yet it carries a more pronounced bitter/licorice note — which is why it remains a value and heat-stable option rather than a premium one. The two glycosides that define modern, clean-tasting stevia are Rebaudioside A and Rebaudioside M:
| Compound | Source & Leaf Level | Sweetness vs. Sucrose | Taste Profile / Aftertaste | Best For |
|---|---|---|---|---|
| Rebaudioside A (Reb A) | 2–4% of dried leaf — the most abundant high-quality glycoside | 200–250× | Clean and well-rounded; markedly less bitter than stevioside, though a slight aftertaste can emerge at higher use levels[1] | Mainstream clean-label beverages, reduced-sugar dairy, confectionery, table-top sweetener blends |
| Rebaudioside M (Reb M) | <1% of dried leaf — produced at commercial scale via enzymatic bioconversion and high-Reb-M leaf varieties | 200–350× | The most sugar-like of all steviol glycosides — minimal bitterness and essentially no lingering aftertaste[1] | Premium beverages and dairy, full sugar replacement, next-generation deep sugar-reduction formulations |
For a full side-by-side of the Reb A vs. Reb M taste profile, thermal stability, and cost trade-offs, see our Rebaudioside M guide, including a full Reb A vs. Reb M breakdown.
Available Grades and Specifications
| Grade | Glycoside Content | Primary Compound | Typical Application |
|---|---|---|---|
| Stevioside 80–95% | 80–95% stevioside (total steviol glycosides) by HPLC | Stevioside dominant | Entry-level and cost-sensitive food formulation, blended sweetener bases, baked goods, heat-processed foods, pharmaceutical syrups and chewables, confectionery |
| Reb A 80–98% | 80–98% Rebaudioside A by HPLC | Reb A dominant | Mainstream to premium clean-label beverages, reduced-sugar dairy, confectionery, table-top sweetener; high-purity grades meet EU/FDA high-purity compliance |
| Reb M 95% | 95% Rebaudioside M by HPLC | Reb M dominant | Premium beverages and dairy demanding the most sugar-like taste with virtually no aftertaste; next-generation reduced-sugar and full sugar-replacement formulations |
| GSG 80% | 80% glucosylated steviol glycosides by HPLC | Enzyme-modified glycosides | Rounder, more sugar-like taste with reduced bitter/licorice aftertaste; beverages, dairy, and sweetener blends seeking improved mouthfeel at lower cost than high-purity Reb M |
Key Technical Properties for Formulation
Thermal Stability
Both compounds demonstrate sufficient stability for most food processing applications, though studies indicate that stevioside is less stable than Rebaudioside A at elevated temperatures (≥120°C), with degradation products forming under acidic conditions. Processing parameters should be optimized for specific applications to minimize glycoside degradation.[2]
pH Stability
Stevia extract maintains consistent stability across pH 2–10, covering carbonated beverages, functional waters, and acidic dairy applications where many alternatives degrade below pH 4.
Use Level, Formulation Efficiency & Steviol Equivalents
At 250–300× sucrose sweetness intensity, practical use levels are minimal. As a reference: replacing 10 g of sucrose requires approximately 35–40 mg of 90% stevioside or 40–50 mg of 80% Reb A, depending on the application matrix. This ultra-low inclusion rate simplifies ingredient labeling, reduces per-unit cost contribution, and minimizes caloric addition — all clean-label formulation advantages. For acceptable daily intake (ADI) compliance, regulators express intake as steviol equivalents using glycoside-specific conversion factors (approximately 0.40 for stevioside, 0.33 for Rebaudioside A, and 0.25 for Rebaudioside M); the JECFA/EFSA ADI is 4 mg/kg body weight per day expressed as steviol. Because Reb M carries the lowest conversion factor, it contributes the least to the steviol-equivalent total at a given dose.[3]
Formulation Applications
- Beverages (RTD, carbonated, functional): Reb A 97–98% stevia extract is the standard specification for clean-tasting beverage applications; Reb M 95% is the premium upgrade where a fully sugar-like profile is the goal. Pairs synergistically with erythritol for improved mouthfeel; with monk fruit extract for reduced cost at equivalent sensory profile
- Baked goods and heat-processed foods: Stevioside-grade extract (90–95%) is the right choice when baking with stevia at scale, providing thermal stability in cookies, protein bars, and confectionery coatings. The stronger flavor matrix of baked goods masks stevioside’s aftertaste effectively
- Pharmaceutical excipients: Stevioside-grade extract as non-glycemic excipient in syrups, chewable tablets, and oral suspension formulations for diabetic and pediatric populations. USP/NF and Ph. Eur. monograph compliance documentation available
- Nutraceuticals and dietary supplements: 80% total glycoside extract for cost-effective formulation; Reb A 97%+ or Reb M 95% for premium supplement products where taste and label transparency are marketing requirements
- Blended sweetener systems: Stevia extract combined with erythritol, allulose, or inulin for sucrose-like mouthfeel and reduced aftertaste. For a complete user guide, you can refer to “What Is Stevioside?” Grades, Structure, and Formulation Guide
Sourcing Criteria
| Criterion | What to Require |
|---|---|
| Glycoside-Specific Standardization | Specify stevioside, Reb A, or Reb M as primary compound — “total steviol glycosides” alone does not confirm which compound dominates and cannot predict sensory performance |
| HPLC Method | HPLC quantification per batch — not UV spectrophotometry, which is less accurate for individual glycoside differentiation |
| Regulatory Documentation | FDA GRAS notification reference; EU authorization under Regulation (EU) No 1131/2011; JECFA evaluation documentation for multinational supply chains |
| Third-Party COA | Stevioside, Reb A, or Reb M content (HPLC), heavy metals (USP <232>), pesticide residues, microbial limits (USP <2021>), moisture — per production batch |
| Certifications | Non-GMO, Kosher/Halal for relevant markets; USDA NOP / EU organic certification available across all grades. FDA-registered facility required for US food and supplement supply chains |
References
[1] Prakash I et al. (2008). Development of rebiana, a natural, non-caloric sweetener. Food and Chemical Toxicology, 46( Suppl 7), S75–S82. doi:10.1016/j.fct.2008.05.004
[2] Kroyer G. (2010). Stevioside and rebaudioside A: novel natural sweeteners — stability and food science applications. Journal für Verbraucherschutz und Lebensmittelsicherheit, 5(2), 225–229. doi:10.1007/s00003-009-0548-5
[3] JECFA. Safety evaluation of certain food additives. Prepared by the Sixty-ninth Meeting of the Joint FAO/WHO Expert Committee on Food Additives. WHO Food Additives Series 60. Geneva: World Health Organization; 2009. ISBN: 9789241660600.
