Understanding Food Adulteration and Sawdust

Food adulteration is the process where the quality of food is lowered either by removing a valuable ingredient or by adding an inferior or harmful substance. This is often done to increase the quantity of the product or reduce its cost.

The question asks which common food item is often adulterated with sawdust. Sawdust is essentially fine particles of wood. It is cheap and readily available. When considering its use as an adulterant, we think about how it might blend in with the appearance, texture, and weight of the food item without being immediately obvious.

Analyzing the Options for Sawdust Adulteration

Let's look at the given options:

• Vinegar: Vinegar is a liquid. Adding sawdust to vinegar would make it cloudy and introduce solid particles that would not dissolve. This would be very noticeable and would significantly alter the nature of vinegar. Sawdust is not typically used to adulterate vinegar.
• Cheese: Cheese is a solid or semi-solid food. While some fillers might be used in certain types of processed cheese, sawdust has a fibrous, gritty texture and would be very difficult to mix into cheese without drastically changing its texture and taste. It would likely be easily detectable. Sawdust is not commonly used to adulterate cheese.
• Coriander powder: Coriander powder is a spice, which is a fine powder made from dried coriander seeds. Sawdust, especially fine sawdust, has a powdery texture and can have a colour similar to some ground spices, particularly if the spices are not bright green. Sawdust can be added to increase the volume and weight of the coriander powder, thus reducing the amount of actual spice needed. This makes it a cheap filler that is difficult to detect just by looking at the powder. The texture can also be somewhat similar to coarsely ground spices.
• Milk: Milk is a liquid. Adding sawdust to milk would be immediately obvious as solid particles floating in the liquid. It would make the milk gritty and unappetizing. Common adulterants for milk are liquids or substances that dissolve or disperse well, like water, starch, or urea. Sawdust is not used to adulterate milk.

Why Sawdust is Used with Coriander Powder Adulteration

Based on the properties of sawdust and the options provided, sawdust is most suitable as an adulterant for powdered spices like coriander powder. Its texture and colour allow it to be mixed with the spice powder relatively easily to increase the volume and weight without being instantly spotted by a consumer. While illegal and harmful, this practice unfortunately occurs.

Therefore, sawdust is commonly used to adulterate coriander powder because it can mimic the powder's texture and colour to some extent, serving as a cheap filler.

Revision Table: Sawdust Adulteration Question

Additional Information on Food Adulteration

Food adulteration is a serious issue worldwide. It can pose health risks depending on the nature of the adulterant. Besides sawdust in spices, here are some other examples of common food adulteration:

• Adding water to milk to increase volume.
• Adding chalk powder or other cheap fillers to flour or sugar.
• Adding artificial colours to sweets or spices to make them look brighter.
• Mixing different, cheaper oils with more expensive oils.
• Using lead chromate (a toxic chemical) to enhance the colour of turmeric or other spices.

Regulatory bodies in different countries work to detect and prevent food adulteration to ensure public health and food safety.