E628 — Dipotassium Guanylate

Dipotassium guanylate (E628) is a flavor enhancer used in the food industry to intensify the savory, umami taste of various products. It is the potassium salt of guanylic acid, a nucleotide naturally present in foods such as fish, meat, and certain vegetables. 

Danger Level: 0 — Safe

Chemical Structure and Properties

Dipotassium guanylate is a white, odorless crystalline powder that is highly soluble in water. Its chemical formula is K₂(C₁₀H₁₂O₄N₅PO₄). It is often produced through fermentation processes involving sources like yeast extract or sardines. 

Uses in Food Products

E628 is primarily used to enhance the umami flavor in various food items, including:

• Snack Foods: Such as potato chips, corn chips, and flavored crackers.
• Instant Noodles and Soups: To improve the savory taste of broths and seasonings.
• Processed Meats: Including sausages, ham, and other cured meats.
• Sauces and Condiments: To boost the overall flavor profile.

Health Considerations

Dipotassium guanylate is generally recognized as safe when used within established limits. However, individuals sensitive to monosodium glutamate (MSG) or those with gout should exercise caution, as guanylates can metabolize into purines, which may affect uric acid levels. 

Regulatory Status

Regulatory bodies such as the European Food Safety Authority (EFSA) have evaluated dipotassium guanylate and concluded that it poses no health concerns at the current authorized use and use levels. 

Conclusion

Dipotassium guanylate (E628) is a widely used flavor enhancer that contributes to the umami taste in various food products. While it is considered safe for most individuals, those with specific sensitivities should be mindful of its presence in food products.