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Goji berry

Supplement botanical general nutritionimmune
Aka: Lycium barbarum, wolfberry, gou qi zi
Brands seen in Singapore: Navitas Organics, Made in Nature, Micro Ingredients, Dragon Herbs, Organic Traditions
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
General well-being · human trials are few and small
When to take
Daily
Take with
Meals · one trial added 15 g of dried berry to a diet
Studied for
The well-being trials ran 14 to 30 days
Pros & cons
Pros
  • 14-day juice RCT: general well-being scored better
  • 30-day juice RCT: lymphocyte, igg and il-2 rose
  • Long food history · reviews call the fruit non-toxic
Cons
  • Few human RCTS · most data are cell and animal work
  • Reports of bleeding when combined with warfarin
  • Allergic reactions reported in sensitive people
Sources
  1. A Systematic Review of Potential Therapeutic Use of Lycium Barbarum Polysaccharides in Disease (Kwok et al., BioMed Research International 2019) · read 2026-08-27
    what it says
    “Amongst the 20 publications selected, only 2 were clinical studies … Overall, from existing data, there is an evident lack of well-designed randomized control trials to evaluate the effect of LBP in humans”
  2. Health Benefits and Applications of Goji Berries in Functional Food Products Development: A Review (Vidović et al., Antioxidants 2022) — human intervention studies · read 2026-08-27
    what it says
    “In 2008, the first randomized, double-blind, placebo-controlled clinical study was conducted … Participants in the intervention group consumed 120 mL/day of commercial goji juice (GoChi) … the main beneficial effects observed … after 14 days included increasing general well-being”
  3. Vidović et al., Antioxidants 2022 — immune markers in healthy subjects · read 2026-08-27
    what it says
    “the 30-day daily consumption of GoChi led to the improvement of endogenous antioxidant enzyme activities … and an increase in lymphocyte, IgG, and IL-2 levels in healthy subjects, without adverse effects”
  4. Vidović et al., Antioxidants 2022 — side effects of goji berry consumption · read 2026-08-27
    what it says
    “Based on long-term traditional use over 2500 years, goji berry is now generally recognized as a non-toxic food … studies evaluating adequate dosage regimens, adverse reactions, and the long-term safety of goji berries and their products are scarce”
  5. Vidović et al., Antioxidants 2022 — traditional dose range · read 2026-08-27
    what it says
    “dosages used in traditional medicine, which range from 6–30 g of dried whole goji berry”
  6. Vidović et al., Antioxidants 2022 — whole dried wolfberry within a dietary pattern (Toh et al., 2021) · read 2026-08-27
    what it says
    “Toh et al. (2021) investigated the effects of healthy dietary patterns, either with or without whole dried wolfberry (15 g/d), in middle-aged and older adults”
  7. Vidović et al., Antioxidants 2022 — interaction with oral anticoagulants · read 2026-08-27
    what it says
    “There is evidence that the concomitant use of Lycium fruit tea, juice, and wine with oral anticoagulants, such as warfarin, might increase the risk of bleeding”
  8. Vidović et al., Antioxidants 2022 — flecainide case report · read 2026-08-27
    what it says
    “Guzman et al. (2021) described the toxicity of the antiarrhythmic drug flecainidine in a 75-year-old female associated with goji berry tea consumption as a self-medication practice”
  9. Vidović et al., Antioxidants 2022 — allergy signal · read 2026-08-27
    what it says
    “there is growing evidence that goji berries may trigger allergic reactions in sensitive individuals, especially across Mediterranean populations”
  10. Vidović et al., Antioxidants 2022 — hepatotoxicity case reports · read 2026-08-27
    what it says
    “There are also reported cases of hepatotoxicity related to consuming goji berry”
  11. HSA — Guidelines on Prohibited and Restricted Ingredients in Health Supplements and Traditional Medicines, GL-CHPB-1-012 Rev 001 (Oct 2025) · read 2026-08-27
    what it says
    “The objective of this guideline is to highlight the substances of concern when used in HS and TM and is not meant to be an exhaustive list [goji / Lycium barbarum not listed in Annex A or B]”
  12. HSA — Health Supplements Guidelines (Jan 2026), clause 4.8 and Tables 4–5 (vitamins and minerals limits) · read 2026-08-27
    what it says
    “HS for use by the general adult population should not contain vitamins and minerals exceeding the stipulated limits stated in Tables 4 and 5”
  13. iHerb Singapore — Goji Berries category (default order) · read 2026-08-27
    what it says
    “Navitas Organics, Organic Goji Berries … Made in Nature, Organic Dried Goji Berries, Sun-Dried, Unsulfured … Micro Ingredients, Organic Goji Berries … Dragon Herbs, Heaven Mountain® Goji Berries … Organic Traditions, Goji Berries”
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Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.