Herbal & Flower Teas
Prepared Rehmannia, Polygonatum and Goji Berry Tea
traditionally associated with easing nighttime dry mouth and bitter taste from fatigue or poor sleep
In short: Prepared Rehmannia, Polygonatum and Goji Berry Tea is a herbal & flower tea that traditionally associated with easing nighttime dry mouth and bitter taste from fatigue or poor sleep. It is most often made for sleep & calm, energy & vitality, oral & throat comfort. Total time about 45 min. Key ingredients: goji berries.
Why people make this tea
That dry, slightly bitter taste in the mouth — especially noticeable in the evenings — is something many busy, overworked people recognise. It can come from too many late nights, too much tobacco or alcohol, or simply running the body on empty for too long. Beyond lifestyle factors, it can also relate to oral health issues such as gum inflammation or a shortage of vitamin B2 (found in foods like animal liver, fish, seaweed, eggs, and dark leafy vegetables). This simple three-herb tea has a long tradition in Chinese food therapy as a gentle way to nourish yin and blood, and to support the liver and kidneys when they are depleted by fatigue and poor sleep.
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.
- Goji berries
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
From the Nourilo Research Library. Findings come from specific doses, extracts and populations and may not apply to a home-cooked recipe.
Safety first — read before you cook
This is a traditional food, not a treatment. Please check with your doctor or pharmacist before making it a regular part of your diet if you:
- are pregnant or breastfeeding, or are cooking for a young child;
- take regular medicines — especially blood thinners, blood-pressure, diabetes or immune-suppressing drugs;
- have a kidney, liver or heart condition, or a known food allergy.
Ingredient notes for this recipe
- Goji berries: A few cases of raised INR (a bleeding-risk marker) have been reported in people taking warfarin after drinking concentrated goji tea or wine. If you take a blood thinner, check with your doctor. Source: Memorial Sloan Kettering — Lycium
Stop eating it and seek advice if you notice an allergic reaction or feel unwell. Safety notes reviewed 8 October 2026 · How we write safety notes
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