Q&A: Is erythritol a safe and healthy sugar substitute?

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Q&A: Is erythritol a safe and healthy sugar substitute?

Question: A friend has a family history of diabetes and obesity. She is diligent about eating healthfully and enjoys sharing new recipes and information about food. Recently she mentioned a sugar substitute called erythritol. I'm not familiar with this product. Can you explain what it is and if it is healthy?