Impactful Nutrition Co.

Kelsey Costa, MS, RDN

Kelsey Costa, MS, RDN, is a registered dietitian nutritionist specializing in integrative and functional nutrition.

With a background in English and advanced research literacy, she has merged her expertise to become a respected voice in nutrition and health communications.

Kelsey provides nutrition consulting services as a writer, reviewer, and expert source for top brands and organizations. She's also the founder of Dietitian Insights, a collaborative and online publication for registered dietitians.

Serving leading brands and media —

Consulting Services

Nutrition Writing & Science Journalism

Kelsey provides expert insights through science-based nutrition content that builds your authority and audience engagement.

Featured roles:
Healthline, Medical News Today, MyFitnessPal, GoodRx

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Nutrition Reviews & Fact Checking

Kelsey ensures your content’s medical and factual accuracy and clarity — safeguarding your audience and reputation.

Featured roles:
Healthline, Medical News Today, The Edge

Expert Source Commentary

On behalf of your organization, Kelsey provides attributed expert quotes for publication in popular online media outlets.

Featured roles:
Examine, Diabetes Strong

Featured content

  • 8 Food and Nutrition Trends for 2025, Predicted By The Experts

    MyFitnessPal Blog

  • A Common Low-Calorie Sweetener May Raise Blood Clotting Risk

    Healthline

  • Can a Healthy Diet Help Alleviate Chronic Pain?

    Medical News Today

  • Are Protein Bars Health Food or Hype? A Dietitian Shares What to Look for, and What to Avoid

    GoodRx Health

View Portfolio

What Clients are Saying

  • "Kelsey is an invaluable asset to Diabetes Strong as a medical reviewer and fact-checker of our nutrition articles. Her insightful feedback and clear communication style make working with her a pleasure for our editorial team. She is very knowledgeable, thorough, and detail-oriented, and having her on the team makes the articles we produce better, easier to understand, and more science-based."

    Tobias Oerum, Owner
    Diabetes Strong

  • “Working with Kelsey on our recent project was a delightful experience. The primary benefits we experienced included: expertise and knowledge, transparent communication, flexibility and adaptability, and timely delivery. We're looking forward to more collaborations in the future!”

    Azhar Ahmed, Digital Marketing Manager Consumer Health Digest

  • "Kelsey is easy to collaborate with; her work is always detailed, prompt, and of high quality."

    Kamal Patel, Co-Founder
    Examine.com

  • "The projects are always completed efficiently and on time. Kelsey Costa is a responsible and dedicated expert. She has profound knowledge and experience in her field to create high-quality content for the audience and her customers as well."

    Alice Khuong, Editor
    Astronet Media Brands

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