Troubleshoot on Flavour & Colour Compounds
WHAT ARE COLOUR ADDITIVES?
Color additives are substances added to foods to impart, restore, or maintain color. They can be synthetic or derived from natural sources such as plants, minerals, or animals. They serve a visual purpose, enhancing the appearance of the final product while not increasing calories or adding a flavor. In food, color additives can replace the natural color that is sometimes lost during processing, ensure a consistent appearance each time a food is produced.
WHAT IS THE DIFFERENCE BETWEEN NATURAL AND ARTIFICIAL FOOD FLAVOURS?
Natural flavours are derived directly from natural sources like spices, fruits, or fermentation products. Artificial flavours are chemically synthesized in a lab to mimic these natural tastes, often providing greater cost-efficiency and stability.
DO COLOUR COMPOUNDS AFFECT THE TASTE OF FOOD?
No, colour additives are purely visual. However, they alter human perception: consumers subconsciously
associate specific hues with specific flavours, directly impacting their tasting experience.
WHAT ARE VOLATILE AND NON-VOLATILE FLAVOUR COMPOUNDS?
Volatile compounds evaporate into the air when food is heated or chewed, creating the aroma of the food.
Non-volatile compounds are tasted directly on the tongue (e.g., sweetness from sugars, sourness from citric acid,
or umami from amino acids).
WHAT ARE THE PRIMARY CHEMICAL FAMILIES OF FLAVOUR COMPOUNDS?
Flavour and aroma molecules fall into several chemical families, including esters (fruity notes),
aldehydes (green or pungent notes), ketones (dairy or buttery notes), terpenes (citrus or herbal notes), and
lactones (coconut or peach notes).
WHY DO NATURAL COLOURS FADE DURING FOOD PROCESSING?
Natural pigments, such as anthocyanins, are sensitive to high temperatures, oxygen exposure, and varying pH levels during
manufacturing, which can break down their molecular structure and cause fading.
HOW DOES pH AFFECT FOOD COLOUR?
Many natural pigments act as natural pH indicators. For example, anthocyanins (found in blueberries or red cabbage)
can turn red in acidic environments and blue or green in alkaline environments.
WHAT IS A "LAKE" IN FOOD COLOURING?
A lake is a water-insoluble pigment made by combining a water-soluble dye with an aluminum substrate.
Lakes are highly stable and are used to colour fatty, oil-based, or dry products where water-based dyes would bleed.
HOW DO MANUFACTURERS PROTECT FLAVOUR COMPOUNDS FROM EVAPORATING?
Through a process called encapsulation. Flavours are encased in a protective matrix (like starch or maltodextrin),
preventing evaporation or degradation until the consumer eats the product.
WHAT IS THE MAILLARD REACTION, AND WHY IS IT IMPORTANT?
The Maillard reaction is a chemical reaction between amino acids and reducing sugars that occurs when food is
heated (e.g., baking bread, roasting coffee). It creates hundreds of complex flavour compounds and the
signature brown colour of cooked foods.
ARE ARTIFICIAL COLOURS SAFE TO CONSUME?
All approved artificial food dyes (like FD&C Red No. 40 and Yellow No. 5) undergo rigorous safety evaluations and
toxicological testing by regulatory agencies like the US FDA and EFSA before approval.
WHAT IS "BATCH CERTIFICATION" FOR FOOD COLOURS?
Batch certification is a process where regulatory bodies analyse representative samples of synthetic,
certifiable colour batches to ensure they meet strict chemical purity and specification standards
before being sold to manufacturers.
DO ANY NATURAL COLOURS COME FROM INSECTS?
Yes. Carmine (or cochineal extract) is a highly stable, bright red pigment derived from crushing cochineal insects.
It is widely used in yogurts, juices, and confections.
WHAT ARE FLAVOUR ENHANCERS?
These are compounds that have no distinct flavour of their own but amplify the existing tastes in food. A common
example is monosodium glutamate (MSG), which enhances the savoury/umami flavour of foods.
WHAT ARE NATURE-IDENTICAL FLAVOURS?
These are chemical structures produced in a lab that are molecularly identical to the flavour compounds found in nature.
They are not extracted from the original plant but provide the exact same sensory profile.
HOW DO MANUFACTURERS MAINTAIN FLAVOUR CONSISTENCY ACROSS PRODUCT BATCHES?
Through the exact blending of concentrated, standardized flavour compounds. This compensates for natural variations in raw ingredients due to different growing seasons or geographical locations.
HOW DO YOU FIX "COLOUR- FLAVOUR DISSONANCE"?
If a natural colour degrades and changes hue (e.g., a yellow shifting to a slight orange), manufacturers adjust the
flavour profile (e.g., adding mango or passionfruit notes) so the colour shift feels intentional to the consumer.
WHAT IS THE STANDARD STARTING DOSAGE FOR FORMULATED FLAVOUR COMPOUNDS?
A general benchmark for liquid formulated flavours is roughly 500 ppm, which equates to 500 milligrams
per litre of liquid. Dosage varies greatly by application, and manufacturers often run
sensory tests to dial in the exact profile.
WHY DO NATURAL COLOURS FADE UNDER LIGHT OR HEAT?
Pigments like anthocyanins and chlorophyll lack the robust chemical bonds of synthetic dyes. Use
UV-protective packaging or switch to microencapsulated pigment variants
HOW TO PREVENT THERMAL LOSS OF VOLATILE FLAVOUR NOTES DURING COOKING?
High heat drives off delicate top notes (like citrus or herbs). Inject thermally stable flavor precursors or
add liquid flavor profiles post-cooling
WHAT CAUSES CHLOROPHYLL TO TURN OLIVE-BROWN DURING PROCESSING?
Heat strips the magnesium ion, changing it to pheophytin. Shorten thermal
processing times or apply high-pressure processing (HPP)
HOW DOES LIPID OXIDATION AFFECT FLAVOUR STABILITY?
Fats break down into rancid aldehydes and ketones. Add natural antioxidants like
tocopherols or flush packaging with nitrogen gas.
WHY DOES THE COLOUR OF A PRODUCT SHIFT AT DIFFERENT pH LEVELS?
Anthocyanins turn red in acid and blue in neutral/alkaline environments. Add food-grade
buffers (such as citric acid or sodium citrate) to lock in the target pH.
HOW DO TRACE METAL IONS INTERACT WITH FOOD DYES?
Minerals in hard water or fortification ingredients reduce dye intensity or form precipitates. Use purified/filtered
water and add chelating agents like EDTA
CAN NATURAL COLORANTS INTRODUCE UNWANTED OFF-FLAVORS?
Plant extracts like turmeric or spirulina carry their own distinct earthy tastes. Deodorize extracts or use
high-purity fractionated distillates
WHY DO OIL-BASED FLAVOURS SEPARATE IN WATER-BASED BEVERAGES?
Inadequate shear energy or poor emulsifier ratios cause phase separation. Use stable oil-in-water
nano-emulsions with appropriate hydrocolloid carriers
HOW TO MANAGE SEASONAL COLOUR VARIATIONS IN RAW AGRICULTURAL MATERIALS?
Crops vary in hue based on weather and soil. Standardize batches using computer color-matching
and adjusting pigment concentration dynamically
WHAT IS THE DIFFERENCE BETWEEN NATURAL COLOURS AND COLOURING FOODS?
Coloring foods are non-additive ingredients (like spirulina juice or carrot extract) subject to cleaner label rules. Align
product labeling requirements with target regional regulations before sourcing.
HOW DO YOU STOP SUGAR CRYSTALLIATION FROM TRAPPING OR ALTERING FLAVOUR RELEASE?
Poor syrup mixing creates uneven matrix pockets. Optimize dissolution temperatures and mixing shear profiles.
DOES PROTEIN BINDING DULL FLAVOR IMPACT?
Plant proteins (like pea or soy) bind to flavor molecules, reducing taste intensity. Block binding sites or adjust flavor load compensation
HOW TO HANDLE THE PHASE-OUT OF CERTAIN SYNTHETIC DYES SAFELY?
Regulatory shifts pressure brands toward plant alternatives. Reformulate early with stable
crystal and liquid natural systems.
HOW DO INTERACTIONS WITHIN A COMPLEX FOOD MATRIX AFFECT ANALYTICAL TESTING?
Hundreds of overlapping volatile compounds complicate chromatography. Use multi-technique isolation
(like solid-phase microextraction combined with gas chromatography-mass spectrometry).
WHAT IS THE BEST WAY TO SCALE UP A LAB-TESTING FLAVOUR/COLOUR PROFILE?
Equipment differences alter shear and heat profiles. Recalibrate mixing times and jacket
temperatures for industrial-scale tanks
