Raphael Kellman MD Books

Microbiome Thyroid

By Raphael Kellman MD

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The microbiome diet

By Raphael Kellman

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"What is the microbiome? These trillions of tiny microbes living within our intestines help us extract the nutrients from our food in addition to exerting enormous influence over our metabolism, ho...

The Microbiome Breakthrough

By Raphael Kellman M.D.

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Microbiome Diet

By Raphael Kellman

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The whole brain

By Raphael Kellman

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"If you are one of the millions of people who feel that your brain just "isn't working right"-- that you have brain fog, memory loss, depression, or anxiety, or that your ability to maintain a bala...

How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.