# item.guide
Side-by-Side Comparison Food Additives & E-Numbers

E322: Lecithin (Phospholipid Emulsifier & Viscosity Reducer) vs. E627: Disodium Guanylate (GMP Umami Synergist)

Comparing 2 standards across 14 specifications. 14 key differences identified.

Comparing:
E322: Lecithin (Phospholipid Emulsifier & Viscosity Reducer)
E627: Disodium Guanylate (GMP Umami Synergist)

Lecithin (E322) is a complex mixture of zwitterionic polar phospholipids (phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol) derived from soybeans, sunflower seeds, or egg yolks, functioning as an amphiphilic oil-in-water surfactant and chocolate viscosity reducer.

View full E322: Lecithin (Phospholipid Emulsifier & Viscosity Reducer) spec sheet →

E627 (Disodium 5'-Guanylate / GMP) is the sodium salt of guanylic acid, a purine nucleotide naturally concentrated in dried shiitake mushrooms. INS 627, ADI is Not Specified, exhibiting massive 8x–30x synergistic umami amplification when paired with MSG.

View full E627: Disodium Guanylate (GMP Umami Synergist) spec sheet →

Specification Comparison Table

14 Parameters
Parameter / Spec
Acceptable Daily Intake (ADI)
Not Specified (Quantum Satis / GRAS under FDA 21 CFR 184.1400) Not Specified (Quantum Satis)
INS / E-Number
INS 322i (Lecithin) / INS 322ii (Partially Hydrolyzed)
Primary Phospholipid Composition
19–21% Phosphatidylcholine (PC), 8–20% PE, 10–15% PI
Hydrophilic-Lipophilic Balance (HLB)
HLB 4.0–6.0 (Standard unbleached) / HLB 8.0–10.0 (Enzymatically modified lyso-lecithin)
Acetone-Insoluble Matter
≥ 60.0% (standard benchmark of active phospholipid content)
Major Sources
Soybean (Glycine max), Sunflower (Helianthus annuus - non-GMO / allergen-free), Rapeseed, Egg yolk
E-Number Code
E627
INS / Codex Number
INS 627
Functional Class
Flavor Enhancer (Purine Nucleotide Umami Synergist)
Chemical Formula
C10H12N5Na2O8P · xH2O
Primary Mechanism
Binds allosteric site on T1R1/T1R3 umami receptor, locking glutamate into the orthosteric binding pocket
Common Target Foods
Savory snack seasonings (Doritos, chips), instant ramen noodle seasoning packets, bouillon cubes
Dietary Compliance
Vegan (Microbial fermentation of tapioca/sugar), Halal, Kosher
Safety Approval
EFSA Authorized / FDA GRAS (21 CFR 172.530)

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