Quick summary

Fo-ti (Polygonum multiflorum) is a traditional Chinese medicinal herb with various proposed health effects including anti-aging, hair regrowth, neuroprotection, and metabolic benefits. Its primary bioactive compound, 2,3,5,4′-Tetrahydroxystilbene-2-O-β-D-glucoside (TSG), has been noted for anti-aging properties and multiple protective effects. However, clinical evidence remains limited with concerns about hepatotoxicity at certain dosages. More rigorous clinical trials are needed to establish efficacy and safety.

What is it

Fo-ti, scientifically known as Polygonum multiflorum, is a herb traditionally used in Chinese medicine. It is sometimes called He Shou Wu in Chinese and is derived from the roots of the plant. Fo-ti contains a variety of bioactive compounds with potential biological effects that have made it popular in herbal medicine.

Traditional uses

Traditionally, Fo-ti has been used in Chinese medicine for promoting longevity, enhancing hair health and pigmentation, supporting cognitive function, and improving metabolic health. It is often utilized as a tonic to address age-related decline and to support vitality.

Active compounds

  • 2,3,5,4′-Tetrahydroxystilbene-2-O-β-D-glucoside (TSG): The main bioactive stilbene glycoside associated with many of Fo-ti’s studied effects.
  • Water-soluble polysaccharides: Studied for immunomodulatory activity.
  • Other phenolic compounds and natural products involved in melanocyte regulation and antioxidant activity.

Potential benefits with evidence levels

  • Anti-aging and age-related diseases (Preclinical and systematic review): TSG has been reported to extend lifespan and provide neuroprotection in models of Alzheimer’s and Parkinson’s diseases. Additional effects include cardiovascular protection, bone loss reduction, and hair regrowth through oxidative stress reduction and mitochondrial support.
  • Immunomodulation (In vitro): Polysaccharides from Fo-ti stimulated macrophage proliferation and production of immune signaling molecules such as nitric oxide (NO), tumor necrosis factor-alpha (TNF-α), and interleukin-6 (IL-6) in cell cultures.
  • Hair pigmentation and regrowth (Preclinical review): Natural compounds from Fo-ti regulate melanocyte stem cells and melanin production. Topical use may be preferable for promoting hair pigmentation.
  • Neuroprotection and cognitive impairment (Systematic reviews of clinical and preclinical studies): Some clinical evidence, although limited by methodological issues, suggests potential cognitive benefits in mild cognitive impairment and Alzheimer’s disease when using formulations containing Fo-ti.
  • Metabolic disorders (Preclinical and TCM integration studies): Fo-ti and its compounds may improve glucose and lipid metabolism, modulate gut microbiota, and alleviate insulin resistance in type 2 diabetes mellitus and metabolic syndrome.

Side effects

Reported adverse effects primarily involve hepatotoxicity including drug-induced liver injury (DILI). Dose-related elevations of liver enzymes and symptoms related to liver dysfunction have been associated with Fo-ti use. Due to this, caution is important especially with higher dosages.

Drug interactions

There are no specific drug interactions conclusively reported. However, because of potential hepatotoxicity and metabolism involving liver enzymes such as cytochrome P450, caution is advisable when used concomitantly with hepatotoxic drugs or agents affecting liver enzymes.

Who should avoid it

Use should be cautious or avoided in individuals with pre-existing liver disease or impaired liver function due to hepatotoxicity concerns. Safety in pregnancy and breastfeeding is not established, so it is advisable to avoid use during these periods or consult a healthcare provider prior to use.

Evidence limitations

  • Most clinical studies on Fo-ti have low methodological quality, small sample sizes, and short durations.
  • Evidence for hepatotoxicity mostly comes from case reports, animal, and preclinical studies, with inconsistent dosing and quality control.
  • Lack of large, well-designed randomized controlled trials on safety and efficacy for specific indications.
  • Variability in formulations (raw, processed, extracts) complicates comparison and generalization.
  • Limited human pharmacokinetic and pharmacodynamic data restrict clinical mechanistic understanding.

References

Last reviewed

June 2024

Disclaimer: This information is provided for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any new supplement or herbal treatment, especially if you have existing health conditions or are taking other medications.