In the realm of wellness trends, bone broth may seem like a pretty innocuous one. It's broth, after all. So the claims that bone broth is nourishing, nutrient-rich, and generally supportive of good health aren't so hard to believe.

But there isn't much actual research into the benefits of bone broth. So we looked into what we know about bone broth — and got a registered dietitian's go-to recipe (which is easier than you might think, especially if you have a slow cooker). Esther Blum , MS, RD, CDN, CNS, is a clinical and holistic dietitian.

Julie Upton, MS, RD, is a dietitian and the co-founder of Appetite for Health. Bone Broth Benefits Bone broth is made by simmering animal bones (often with some meat attached) and ideally vegetables in water for up to a full 24 hours. The resulting broth is more protein-rich than other broths or stocks, with nutrients including collagen, gelatin, calcium, magnesium, and phosphorus, reports MD Anderson .

Esther Blum , MS, RD, CDN, CNS, explains that bone broth is rich in glutamine and glycine, two amino acids that "help repair cells and heal gut inflammation." Blum believes a daily cup of bone broth can help people avoid illness during sick season. Bone broth certainly feels good — nourishing and cozy, especially on a cool, damp day.

But there aren't any studies that back up its purported benefits, which is why dietitian Julie Upton, MS, RD, says that bone broth seems to be "a lot of hype but no substance." What's more, some studies have.