Four Red Soup (Si Hong Tang)

What studies say about the key ingredients

Traditional use is not the same as clinical proof. Here is the strongest human research we found for each ingredient, limitations included.

• Adzuki beans · Randomized crossover trial, 10 participants · 2019
  Adzuki bean meals had a low glycemic index (21–51 range reported with lotus seed), whereas other starchy foods did not differ significantly from rice. Adzuki bean hydrolysis index was lower than other test foods.Limitation: Only ten healthy participants and acute single-meal responses, so effects in people with diabetes or with regular intake are unknown.PubMed 30875961 · 1 more adzuki beans study
• Goji berries · Meta-analysis, 161 participants · 2012
  Compared with placebo (n=80), the goji juice group (n=81) reported greater improvements in several self-rated symptoms, including stress, mental acuity, sleep quality and overall well-being, under a random effects model.Limitation: Outcomes were self-reported symptom questionnaires, and several symptoms showed significant heterogeneity across the four pooled trials of a single branded juice.PubMed 22897500 · 3 more goji berries studies
• Red dates · Meta-analysis, 483 participants · 2025
  Jujube was associated with significantly lower BMI and triglycerides, and lower fasting blood sugar in people with type 2 diabetes. LDL and total cholesterol fell only in some subgroups. HDL, AST and ALT did not change significantly.Limitation: The authors state the overall quality of the evidence is limited, and results varied significantly by dose, treatment duration and disease type.PubMed 40399274 · 3 more red dates studies

From the Nourilo Research Library. Findings come from specific doses, extracts and populations and may not apply to a home-cooked recipe.