Can patients with chronic nephritis consume Codonopsis root (Dang Shen)?

Patients with chronic nephritis may consume Codonopsis root (Dang Shen). Its primary constituents are starch and glucose, and it contains no components harmful to the kidneys; therefore, it is safe for consumption. For patients with chronic nephritis, the main dietary considerations involve restricting sodium (salt) and protein intake. Excessive salt intake can exacerbate edema and further elevate blood pressure, potentially leading to heart failure or cerebrovascular accidents—such as intracerebral hemorrhage. Thus, daily salt intake should be limited to no more than 3 grams—approximately the amount that fits in half a beer bottle cap—and pickled foods (e.g., preserved vegetables) should also be restricted.

Secondly, high-protein foods—including eggs, duck eggs, lean meats, fish, and soy products—should also be limited. Overconsumption of such foods increases urinary protein loss and may accelerate deterioration of renal function; therefore, their intake must be carefully controlled. Aside from these restrictions, most other foods may be consumed in moderation. For instance, Codonopsis root—which is rich in starch and carbohydrates—is safe and permissible for patients with chronic nephritis.