You stand in a grocery store. A box promises "natural," "multigrain," and "low-fat." But what do the numbers actually mean?
Most people ignore food labels entirely. Others read them but dont understand what theyre seeing.
Reading food labels is a practical skill that transforms shopping into informed decision-making. The Institute of Nutrition and Fitness Sciences (INFS) emphasizes that understanding nutrition facts label information is foundational for preventive health education.
This blog explains what every number means, how to spot misleading claims, and why context matters more than a single nutrient value.
Understanding Nutrition Facts Label: Serving Size vs Portion Size
Why does label reading matter? Research shows that food-labelling interventions reduce energy intake by 6.6% on average (Shangguan et al., 2019). Understanding what the numbers actually mean transforms grocery shopping into informed decision-making.
The first question is not How many calories? but For how much food?
Under FSSAI rules, nutrition information is listed per 100 g, per 100 ml, or per single-consumption pack. Per 100 g or 100 ml is best for comparing similar products,its standardized.
Serving size vs portion size are often confused. A serving is what manufacturers claim is typical. A portion is what you actually eat. If a packet contains two servings and you finish it, you consume twice the listed nutrients, 120 calories per serving becomes 240 calories total.
Always check servings per package to prevent underestimating intake.
How To Correctly Read A Food Label: The Foundation
Do Calories Tell You Everything? Understanding Nutrition Quality
Calories describe energy supplied by food. They do not show complete nutritional quality.
Two foods with identical calories can have vastly different protein, sugar, fat, and sodium profiles. A 200-calorie protein bar differs nutritionally from 200 calories of candy.
For weight management, total energy intake matters. But choosing food only by lowest calorie number is misleading. Always read calories alongside protein, added sugar, and ingredient quality.
How To Spot Hidden Sugars On Labels: Protein Claims vs Reality
High-protein claims hide large amounts of added sugar, saturated fat, or sodium. Read the complete profile, not single nutrients.
Total sugars include naturally occurring and added sugars. Plain milk and sweetened milk both contain total sugar,only the latter contains added sugars.
How to spot hidden sugars: Check the "added sugars" line, not total sugars. Juice might have 12g total sugar and 12g added sugar (all added). Unsweetened fruit has total sugar but zero added sugar.
With fat, focus on type, not grams. Saturated and trans fat values help compare packaged foods. ICMR-NIN advises limiting foods high in fat, sugar, and salt.
Percent Daily Value Explained: How Much Is 25% Really?
FSSAI calculates per-serve percentage contribution to RDA using adult reference values.
These include:
- 2,000 kcal per day
- 67 g total fat
- 22 g saturated fat
- 2 g trans fat
- 50 g added sugar
- 2,000 mg sodium
If one serving provides 25% of the reference for added sugar, it uses one quarter of that daily reference before other foods are counted.
Important: Individual needs vary with age, sex, body size, activity, pregnancy, medical conditions, and goals. Use percent daily value as a comparison tool.
How Much Sodium Per Day? Understanding Label Numbers
Sodium is listed in milligrams. The number looks small compared to nutrients shown in grams. FSSAI uses 2,000 mg sodium (about 5 g salt) as the adult daily reference.
A snack with 480 mg per serving and two servings per pack provides 960 mg total, nearly half your daily reference.
The useful question is not whether a food contains sodium, but how much one portion contributes to your overall day. When several packaged foods are eaten daily, sodium accumulates quickly.
How To Read Ingredient Lists: What The Order Actually Means
Ingredients are listed in descending order by weight at manufacture. The first few ingredients give a quick picture of what the product is mainly made from.
This distinguishes a cereal based mainly on refined flour and sugar from one based mainly on whole grains, nuts, and seeds.
Marketing terms, "multigrain," "baked," "source of vitamins," "no added sugar", should be checked against the full label. Fortifying an ultra-processed or high-fat, high-sugar food does not make it wholesome.
The ingredient list and nutrient panel are more informative than a single front-of-pack claim.
Reading Food Labels For Beginners: The 30-Second Routine
You do not need to analyze every line every time. A short routine compares two products and decides which fits your health goals.
Step 1: Check The Quantity Basis
Look at per 100 g/100 ml and serving size before comparing calories or nutrients.
Step 2: Check Energy And Your Main Nutrient
For a protein snack, look at protein. For a sweetened drink, look at added sugar.
Step 3: Scan Nutrients Of Concern
Compare added sugar, saturated fat, trans fat, and sodium between similar products.
Step 4: Read The First Few Ingredients
They reveal what the product is mainly made from.
Step 5: Ignore The Health Halo
Judge claims like "fit," "natural," or "multigrain" only after checking actual nutrition and ingredients.
What To Avoid When Reading Food Labels
What to avoid when reading food labels prevents misjudgment:
Avoid Focusing On Single Nutrients
A product high in protein but loaded with added sugar is not a ‘health’ food. Read the complete picture.
Avoid Trusting Front-Of-Pack Claims Alone
"Multigrain" doesnt mean whole grain. "No added sugar" doesnt mean sugar-free. Always verify with the nutrition label and ingredient list.
Avoid Comparing Products By Different Bases
One product shows per 100 g, another per serving. Always standardize to per 100 g for fair comparison.
Avoid Ignoring Serving Size
A small serving size can make a high-calorie product look reasonable. Always multiply by actual servings consumed.
Avoid Assuming All Sugars Are Equal
A product with 10g total sugar from fruit differs from 10g from added sugar. Check both lines.
Key Takeaways
- Reading food labels: Start with serving size and per 100 g basis
- Understanding nutrition facts label: Read numbers in context, not isolation
- Serving size vs portion size: Multiply nutrients by actual servings consumed
- Calories describe energy, not quality
- How to spot hidden sugars: Check added sugars line, not total sugars
- Percent daily value explained: Shows 2,000 kcal reference; individual needs vary
- Protein, carbs, and fat need context with ingredient quality
- Sodium accumulates across multiple packaged foods daily
- Ingredient list (by weight) reveals what product is mainly made from
- What to avoid: Single nutrients, front-of-pack claims alone, mismatched bases, ignoring serving size
- Marketing terms require verification against nutrition panel
- Compare products using standardized per 100 g basis
Learn More
Explore INFS courses to build expertise in nutrition and food labeling:
Basic Course in Nutrition & Fitness: Master label reading and preventive health education
Certified Nutritionist Course: Learn comprehensive nutrition assessment and counseling
Principles of Diagnostics in Preventive Healthcare: Interpret nutrition data for clinical practice
Visit infs.com/courses today.
Frequently Asked Questions
- How To Correctly Read A Food Label?
Start with serving size and quantity basis (per 100 g or per serving). Check energy and your main nutrient of interest. Scan added sugar, saturated fat, and sodium. Read the first few ingredients. Verify marketing claims against actual nutrition information.
- What To Avoid When Reading Food Labels?
Avoid focusing on single nutrients in isolation. Dont trust front-of-pack claims alone. Never compare products with different quantity bases. Ignore serving size at your peril. Dont assume all sugars are equal, check added sugars specifically.
- How To Read Food Labels For Beginners?
Use the 30-second routine: check quantity basis, verify energy and main nutrient, scan nutrients of concern, read first few ingredients, ignore health claims until verified. Practice comparing two similar products. Consistency builds habit.
- How To Spot Hidden Sugars On Labels?
Look at both total sugars and added sugars. Added sugars are what manufacturers introduce during processing. A product can have high total sugar but zero added sugar (naturally occurring). Check the ingredient list for sugar synonyms: sucrose, glucose, honey, agave, high-fructose corn syrup.
- What Does Percent Daily Value Actually Mean?
Percent daily value shows how much one serving contributes to a 2,000 kcal reference diet. Individual needs vary by age, sex, activity, and health status. Use it to compare similar products, not as personalized nutrition advice.
- Is low-calorie food always healthier?
No. Calories describe energy, not the complete nutritional quality of a food. Compare calories together with protein, added sugar, fat quality, sodium, ingredients and how the food fits into your overall diet.
Disclaimer
This article is for educational purposes only and does not replace professional nutritional advice. Always consult a qualified healthcare provider or registered dietitian before making significant dietary changes, especially if you have medical conditions or dietary restrictions.
References
- Shangguan S, Afshin A, Shulkin M, et al. A Meta-Analysis of Food Labeling Effects on Consumer Diet Behaviors and Industry Practices. American Journal of Preventive Medicine. 2019;56(2):300-314. doi:10.1016/j.amepre.2018.09.024
- Food Safety and Standards Authority of India. Food Safety and Standards (Labelling and Display) Regulations, 2020: Compendium, Version VIII. New Delhi: FSSAI; 2025.
https://stg-old.fssai.gov.in
- Indian Council of Medical Research-National Institute of Nutrition. Dietary Guidelines for Indians 2024. Hyderabad: ICMR-National Institute of Nutrition; 2024. https://www.nin.res.in
- Ghosh RK, Sanghvi R, Sahay A. Consumer preference for nutrition front-of-pack-label formats in India: Evidence from a large-scale experimental survey. Food Quality and Preference. 2023;109:104993. doi:10.1016/j.foodqual.2023.104993