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How to Read a Nutrition Label
The Nutrition Facts label — required on virtually all packaged foods sold in the United States — is one of the most powerful tools available for making informed dietary decisions. Yet it is also one o...
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Dr. Michael Lee
Neurologist
5 min read
|April 30, 2026Medically reviewed by Dr. Michael Lee · Editorial Policy
The Nutrition Facts label — required on virtually all packaged foods sold in the United States — is one of the most powerful tools available for making informed dietary decisions. Yet it is also one of the most frequently misread or ignored pieces of consumer information. A thorough understanding of what each component means, what it tells you about a food, and how to put it in context of your total daily diet transforms the nutrition label from a confusing grid of numbers into a genuinely useful guide.
A Brief History
The original Nutrition Facts label was introduced by the FDA in 1994, following the Nutrition Labeling and Education Act of 1990. The most recent major update — finalized in 2016 and fully implemented by 2020 — made significant changes: increased the font size for calories, added "added sugars" as a separate line, updated serving sizes to reflect how people actually eat, and added vitamin D and potassium (replacing vitamins A and C, which are now adequate in most Americans' diets).
The Top Section: Serving Size And Servings Per Container
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Primary Source
FDA: How to understand and use the Nutrition Facts LabelMedical Disclaimer: This article is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of your physician or other qualified health provider with any questions you may have regarding a medical condition.
Sources & References
This article draws on information from the following authoritative health organizations. Always consult a qualified healthcare professional for personal medical advice.