Why Preservatives Are Necessary
Before we dive into the names, it's useful to know why preservatives are used at all. Their main job is to keep food safe and maintain its quality. They fall into two main camps. First, antimicrobials stop harmful bacteria, yeasts, and moulds from growing,
which prevents spoilage and foodborne illness. Second, antioxidants stop fats and oils from reacting with oxygen and going rancid, which preserves the food's flavour and colour. The Food Safety and Standards Authority of India (FSSAI) classifies preservatives and regulates their use, setting maximum permitted levels for safety.
Decoding INS and E-Numbers
When you scan an ingredient list in India, you'll often see 'INS' followed by a number, or just the number itself. INS stands for International Numbering System, a code used globally to identify food additives. In Europe, these are known as E-numbers. These codes help standardize ingredients across different languages and regions. Preservatives are typically found in the E200 to E299 range. Seeing an INS or E-number means the additive is approved for use by regulatory bodies like the FSSAI, which has determined it to be safe for consumption within specified limits.
Common Antimicrobials to Know
This group of preservatives stops microbial growth. You will frequently find Benzoates (like Sodium Benzoate, INS 211) and Sorbates (like Potassium Sorbate, INS 202) on labels. Sodium Benzoate is very common in acidic foods like sauces, jams, and carbonated drinks. Sorbates are effective against mould and yeast in products like cheese, wine, and baked goods. While FSSAI deems them safe at permitted levels, some studies suggest high consumption of sodium benzoate may be linked to hyperactivity in children and inflammation, though more research is needed.
Antioxidants: BHA, BHT, and TBHQ
To prevent oils and fats in snacks, cereals, and processed meats from tasting stale, manufacturers use antioxidants. Butylated Hydroxyanisole (BHA, E320) and Butylated Hydroxytoluene (BHT, E321) are two of the most common synthetic antioxidants. They are very effective and stable at high temperatures. However, their use is controversial. Some regulatory bodies have classified BHA as a potential human carcinogen and endocrine disruptor based on animal studies, leading to calls for stricter regulation or bans in some regions. While permitted in small amounts, seeing these on a label is a reason for some consumers to seek alternatives.
Sulphites, Nitrates, and Nitrites
Sulphites (E220-E228) are used to prevent browning in foods like dried fruits and juices and inhibit bacterial growth. While safe for most, they can trigger allergy-like symptoms or asthma attacks in sensitive individuals. Nitrates (E251, E252) and Nitrites (E249, E250) are preservatives crucial for curing processed meats like ham and sausages, as they prevent the growth of deadly bacteria like Clostridium botulinum. The concern with nitrites is that when cooked at high heat in the presence of protein, they can form compounds called nitrosamines, which are linked to an increased risk of cancer. For this reason, many health authorities advise limiting the consumption of processed meats.
Your Practical Checklist in the Aisle
Navigating the options can feel overwhelming, but a simple approach works best. First, start with the ingredient list, not the marketing claims on the front of the package. Shorter ingredient lists generally suggest less processing. Look for specific names like 'sodium benzoate' or numbers in the 200-299 range. When comparing two similar products, consider choosing the one with fewer synthetic preservatives or preservatives you recognize from your own kitchen, like salt, sugar, or vinegar (classified by FSSAI as Class I preservatives). Being an informed shopper isn't about eliminating all preservatives, but about making mindful choices.
