Maybe you’ve heard about beef tallow on social media, noticed it at the grocery store or have a friend who recommends cooking with it.

Beef tallow has become a trendy ingredient among some health and wellness influencers as an alternative to common cooking oils.

While there isn’t much science to back up social media’s most extreme health claims, beef tallow can be enjoyed in moderation as part of a healthy diet, dietitians say.

“The key phrase I ...