How about iron? The lab broth contained 4.1 milligrams of iron per liter. That’s a little better, especially if you’re a man, considering the RDA for iron is 8 mg for men and 18 mg for women. We’re looking at 51.25% if you’re a man and almost 23% if you’re female.
Still, how much bone broth can one consume? Some recommend drinking as much as you can, and 8 ounces as a minimum, which would be around a quarter of a liter.
With that dose, you’d receive 12.8% of your iron if you’re a man, and less than 6% if you’re a woman. Not a considerable amount.
Weston A. Price Foundation on Calcium
Even the Weston A. Price Foundation disputes its calcium content. It states:
“Unfortunately, it is a myth that broth is high in calcium. Indeed in 1934, Archives of Disease in Childhood reported “extremely low” levels of calcium even when the recipe included wine or vinegar to help pull it from the bones.
“Today the labels of two excellent bone broths in the marketplace, Saffron Road and Chef Flavor, report the levels of calcium per one cup serving at 0 percent and 4 percent of the RDA, respectively.
“Although WAPF plans to have some other quality broth tested, we have no reason to assume the results will be markedly different. The oft-heard claim that a cup of good bone broth has as much calcium as a cup of milk appears to have no basis in fact.”
Bone Broth’s Protein Content
A 2017 study found that although bone broth does offer increased protein content when compared with regular traditional chicken broth, it still only contains one or fewer of the essential amino acids we need for optimum health4.
Many commercial brands of chicken bone broth contain around an average of 9.5g of protein per 240 ml serving4. The RDA is 0.8g per kilogram of body weight and goes up the more active you are.
However, the amino acids in bone broth mainly come in the form of glycine, alanine, glutamic acid, proline and hydroxyproline5.
Here are the essential amino acids we need to stay healthy: