Guide · Education

How to Read Food Labels for Safety: A Data-Driven Guide

Food labels contain more safety information than most people realize. This guide teaches you how to decode ingredient lists using the same data sources that power PlainFoodSafe's safety scores.

How to read a label here

Ingredients are listed by weight. This index records FDA status and a CSPI rating where one exists, then counts its own flags. The safety score is that flag count, not a nutrition assessment.

By weight
FDA list order, most to least
FDA
regulatory status on each matched additive
CSPI
Chemical Cuisine rating where published

Ingredient List Order Matters

FDA regulations require manufacturers to list ingredients in descending order by weight. The first ingredient makes up the largest proportion of the product, and the last ingredient makes up the smallest. This is the single most important principle for reading food labels.

When you see a concerning ingredient listed near the end, the quantity is likely very small. When you see it near the top, the product contains a significant amount. This context matters when evaluating safety, dose determines the risk for most substances.

Our ingredient database shows which ingredients appear in the most products and their regulatory status across 894,137 product records in PlainFoodSafe.

Database lens

Which flagged ingredients appear most often in the indexed catalog?

Use this as a label-reading starting point: the counts show records that list an ingredient, not a measure of exposure or risk.

  1. Caramel Coloring23,161listed products
  2. Red 4022,216listed products
  3. Yellow 519,566listed products
  4. Carrageenan18,307listed products
  5. Blue 117,024listed products

Source: Open Food Facts labels matched to PlainFoodSafe's documented ingredient flags. This display describes recorded data, not an individual dietary or safety determination.

Understanding FDA Regulatory Status

Not all food ingredients are regulated the same way. The FDA classifies food substances into several categories, each with a different level of scrutiny:

GRAS, Generally Recognized As Safe

GRAS substances are considered safe based on a long history of common use in food (pre-1958) or on published scientific evidence. Examples include salt, vinegar, baking soda, and many spices. The GRAS designation means experts have concluded the substance is safe under its intended conditions of use.

However, GRAS is not a guarantee of safety in unlimited quantities. It means the substance is safe as typically used in food manufacturing. The GRAS system has also been criticized because manufacturers can self-certify their ingredients as GRAS without mandatory FDA review.

Approved Food Additives

Substances that are not GRAS must go through the FDA's food additive petition process. This requires manufacturers to submit scientific evidence of safety. Approved additives have undergone formal review and have specific conditions of use (allowed quantities, types of food, etc.).

An approved additive is not necessarily more or less safe than a GRAS substance, it simply means its safety was evaluated through a different regulatory pathway.

Color Additives

Color additives have their own regulatory framework. Certified colors (like FD&C Red 40) must be batch-tested by the FDA. Exempt colors (like beet juice or turmeric) are derived from natural sources and do not require batch certification. See our FDA Dye Ban guide for more on synthetic dye regulation.

CSPI Safety Ratings Explained

The Center for Science in the Public Interest (CSPI) maintains the Chemical Cuisine database, an independent, peer-review-based assessment of food additive safety. PlainFoodSafe incorporates CSPI ratings into our safety scoring. Their ratings include:

  • Safe - No known health concerns based on current evidence
  • Caution - Some evidence of minor concerns; may warrant limiting intake
  • Cut Back - Scientific evidence suggests reducing consumption is prudent
  • Certain People Should Avoid - Known to cause reactions in sensitive individuals
  • Avoid - Strong evidence of health concerns; should not be in the food supply

CSPI's ratings are independent of the FDA and are sometimes more conservative. When an ingredient has a CSPI "Avoid" rating but an FDA "GRAS" status, it often indicates that newer research has raised concerns not yet addressed by regulatory action.

How PlainFoodSafe Safety Scores Work

Every product in our database receives a safety score from 0 to 100. The score is calculated algorithmically based on four factors:

  1. FDA regulatory status of each ingredient (GRAS, Approved, Listed, Prohibited)
  2. CSPI safety ratings from peer-reviewed toxicology research
  3. Presence of flagged ingredients - 26 substances with documented concerns (synthetic dyes, controversial preservatives, banned substances)
  4. Number and severity of ingredient concerns in the product

A score of 90-100 means no flagged ingredients and all ingredients have favorable safety profiles. A score of 50-69 indicates multiple ingredients with concerns. Below 50 means significant safety concerns are present.

Search for any product on PlainFoodSafe to see its score breakdown, or browse the rankings to compare products in the same category.

What to Watch For on Labels

Across the 894,137 product records in this database, these are the most frequently recorded patterns:

  • Synthetic dye names - Red 40, Yellow 5, Yellow 6, Blue 1, Red 3 (being phased out)
  • BHA and BHT - Preservatives classified as possible carcinogens by international agencies
  • Sodium nitrite - Common in processed meats; linked to colorectal cancer risk
  • Potassium bromate - Banned in California and many countries; sometimes found in baked goods
  • Brominated vegetable oil (BVO) - FDA revoked authorization in 2024
  • Propylparaben - Endocrine-disrupting preservative banned in California food products
  • Titanium dioxide - Banned as a food additive in the EU since 2022

Our ingredient database provides the complete list of flagged ingredients with detailed safety profiles for each one.

How to Check a Label Against This Database

  1. Compare within one category - Rankings place products of the same type on one scale, which is the only comparison the score supports: a cereal and a cooking oil are scored on different additive profiles
  2. Count the additives, not the line length - The score reflects which additives are present and how CSPI and the FDA rate them, not how long the list is. A short list containing a flagged additive scores below a longer list of unflagged ones
  3. Check the brand profile - Some brands score consistently higher across their range. Brand profiles carry the average safety score across every product recorded for that brand
  4. Scan barcodes - Searching by barcode returns the recorded score and the additive list for that exact formulation
  5. "Natural flavors" is not itemised - The term is a regulatory category that can cover many substances, so the additives behind it do not appear in the list this score is computed from

Frequently Asked Questions

What does GRAS actually mean?
GRAS stands for "Generally Recognized As Safe." It means qualified experts have determined the substance is safe under its intended conditions of use. GRAS substances either have a long history of safe use in food (pre-1958) or have been evaluated through published scientific procedures. The FDA maintains the SAFFA (Substances Added to Food) database listing all GRAS substances.
Is a low safety score dangerous?
A low safety score indicates the product contains ingredients with documented safety concerns, not that eating the product once will cause harm. The score helps you make informed choices over time. Occasional consumption of low-scoring products is very different from daily consumption. The scores are designed to help identify patterns, not create alarm about individual servings.
Why do the same brands score differently?
Most brands have a range of products with different formulations. A brand may produce both a high-scoring organic product line and a lower-scoring conventional line. Safety scores are per-product, not per-brand. Brand averages on PlainFoodSafe describe the portfolio; only the per-product record describes a particular product.
Are organic products automatically safer?
Organic products are prohibited from using synthetic dyes, artificial preservatives like BHA/BHT, and most artificial flavors. This generally results in higher safety scores. However, organic certification addresses production methods more than ingredient safety. Some organic products still contain ingredients with caution ratings. Check the actual safety score rather than relying on the organic label alone.
How current is the ingredient data?
Product data is sourced from OpenFoodFacts and updated periodically. FDA SAFFA and CSPI Chemical Cuisine ratings are updated when those organizations publish new guidance. Product formulations can change between our data updates, so always verify against the physical label for the most current ingredients.

Sources

Disclaimer: This guide is for informational purposes only and does not constitute medical, dietary, or health advice. Safety scores are algorithmic assessments based on publicly available data and may not reflect the latest product formulations. Do not make dietary decisions based solely on this information. Consult a healthcare professional for personalized dietary guidance.

Use the record

Turn a label into a source check

Use the product record to see which matched ingredients supplied the flag, then compare like-for-like products rather than treating a score as a diagnosis.

This guide is written and edited by the PlainFoodSafe team, drawing on our OpenFoodFacts/FDA database and public regulatory sources; it is editorial context, not a live database query. Figures cited in this guide are drawn from our OpenFoodFacts/FDA-backed database and public regulatory sources at time of writing; for live, always-current numbers see our entity and rankings pages. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.