Fisetin is a flavonoid antioxidant found naturally in many fruits and vegetables. In recent years, it has gained attention for its potential health benefits, including antioxidant, anti-inflammatory, anticancer, anti-aging, and neuroprotective properties. But does supplementing with fisetin actually lead to these benefits? Evaluating the current research on fisetin is important to determine if it lives up to its promising therapeutic potential. This article will provide an overview of fisetin, examine the existing scientific studies, and discuss its safety and recommended dosage.
What is Fisetin?
Fisetin (3,3',4',7-tetrahydroxyflavone) is a flavonol, a type of flavonoid subgroup of polyphenols. It can be found in many plants, where it serves as a pigment and has antioxidant properties. Fisetin is present in fruits such as strawberries, apples, mangoes, and persimmons at concentrations of 2-160 μg/g.[1] Vegetables including onions, cucumbers, and kale also contain fisetin.[2]
Studies in cell culture and animal models indicate that fisetin has strong antioxidant and anti-inflammatory activities. This has led to investigation of fisetin supplementation for health conditions involving oxidative stress and inflammation.[3] Fisetin is also reported to have neuroprotective, anticancer, anti-aging, and immune-boosting properties. However, further research is needed to fully validate these potential benefits in humans.
1 Antioxidant and Anti-inflammatory Properties
Fisetin is a potent antioxidant, even more so than some other well-known antioxidants including resveratrol and vitamin C.[4] It helps combat oxidative stress by scavenging free radicals and activating antioxidant enzymes. Oxidative stress contributes to many chronic diseases, so fisetin may help defend against damage from excessive free radicals.[5]
In addition, fisetin has shown anti-inflammatory effects in lab studies. It inhibits inflammatory markers including NF-kB, TNF-α, IL-6, and COX-2.[6] This mechanism may underlie its potential protective role against chronic inflammatory conditions such as arthritis, inflammatory bowel disease, and asthma. However, human trials are needed to confirm if fisetin supplementation can improve inflammatory diseases.
2 Potential Health Benefits
The antioxidant and anti-inflammatory activities of fisetin have prompted investigation into its potential health benefits. Here are some of the key areas of research:
3 Cognitive Function
Fisetin has been shown to help maintain normal brain function. Studies in mice found that fisetin could enhance memory and protect nerve cells from oxidative stress-induced damage.[7] This indicates it may support healthy cognitive function into old age.
Heart Health: Animal studies show fisetin can reduce markers of cardiovascular disease, such as LDL and total cholesterol levels.[9] It may support healthy blood vessels and lower heart disease risk, but more research is needed.
4 Anti-Aging
Fisetin activated antioxidant enzymes and inhibited advanced glycation end-products in studies on human fibroblasts and mice.[10] These are mechanisms by which fisetin may help slow the aging process and cellular senescence.
Research Studies and Evidence
Most studies examining the potential health benefits of fisetin have been preclinical, conducted in cell cultures or animal models. There is limited clinical trial data for fisetin in humans. Small, early trials found that oral fisetin supplements conferred antioxidant effects and reduced inflammatory markers in humans.[11] But larger controlled trials are still needed.
Some key limitations in the research include the use of extremely high fisetin doses in cell and animal studies. These do not reflect realistic human dosages. Likewise, the bioavailability of Cotinus cotinus extract might be low because of fast digestion and discharge from the body.[12] More pharmacokinetic concentrates on in people are important to comprehend fisetin retention rates.
Overall, the current evidence suggests fisetin has promising therapeutic potential. But the existing studies are insufficient to conclusively recommend fisetin supplementation for any specific condition. Further rigorous clinical research is required, particularly larger human trials at physiologically achievable doses.
Safety and Side Effects
In light of current proof, fisetin seems to have a decent security profile. Human preliminaries involving oral fisetin supplements for as long as 10 weeks have announced no serious unfavorable effects.[13] Minor aftereffects included migraine, stomach upset, dazedness, and skin flushing.
There is an absence of information on the drawn out security of fisetin supplementation. Because of its consequences for catalysts and pathways in the body, there is a potential for connection with specific prescriptions, like anticoagulants and antiplatelets.[14] Counsel a medical services proficient prior to taking fisetin supplements.
The appropriate dosage of fisetin is still under investigation. Doses up to 300 mg/day for 10 weeks were safely used in clinical trials.[15] For neurological effects, studies suggest doses of 25-50 mg/kg in mice may translate to around 400-800 mg per day in humans.[16] However, without sufficient clinical evidence, no standardized dosage recommendations can be made yet.
Recommendations and Dosage
Based on the available research, the following preliminary fisetin dosage guidelines can be considered:
- General health: 25-100 mg per day with food
- Cognitive support: 100-300 mg per day
- Disease-specific applications: Up to 400 mg per day under medical supervision
However, many factors affect the ideal individual dosage, including age, medical conditions and medication use. It is important to consult a knowledgeable healthcare professional before starting fisetin supplementation. The manufacturer's dosage instructions should also be followed for any commercial fisetin product.
Conclusion
Fisetin is arising as a promising nourishing compound for its cell reinforcement, calming, and potential wellbeing advancing properties. Concentrates on show it might assist with keeping up with mental capability, lessen disease risk, increment life span, and give different advantages. However, the current research has limitations, and rigorous controlled trials in humans are needed to validate its efficacy. At appropriate supplemental doses, fisetin appears to be well-tolerated with a low side effect profile. But consult a medical professional before use. While the early evidence is encouraging, more clinical evidence is required to conclusively determine if fisetin "works" for boosting health and preventing disease.
With thousands of years of traditional use, Cordyceps militaris has a long history of apparent safe consumption. But much remains unknown about its effects, especially long-term usage. Well-designed clinical trials are needed to substantiate potential health benefits and further establish safety parameters. Under medical guidance, Cordyceps militaris extract may one day play a role in supporting healthy aging, but considerable research is still required.
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References
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2. Piatek, A.M. and Zajac, G. Fisetin and hesperetin - flavonoids with powerful multidrug safe switching action. Oncotarget. 2018 Nov 27;9(94):36762-36772.
3. Currais, A. Physiological and Pharmacological Properties of Fisetin: A Survey. Ann Fire up Food Sci Technol. 2021 Jan 28;12:105-128.
4. Maher P. Fisetin follows up on numerous pathways to diminish the effect old enough and sickness on CNS capability. Front Biosci (Education). 2015 Jun 1;7:58-82.
5. Touil YS, Auzeil N, Boulinguez F, Saighi H, Regazzetti A, Scherman D, Chabot GG. Mice's metabolism and disposition of fisetin: ID of geraldol as a functioning metabolite. Biochem Pharmacol. 2011 Oct 1;82(7):1731-9.
6. Chiang EP, Tsai SY, Kuo YH, Pai MH, Chiu HL, Rodriguez RL, Tang FY. Fisetin represses IL-1β-actuated irritation in human osteoarthritis chondrocytes by smothering NF-κB and enacting the Nrf2/HO-1 pathway. Food Funct. 2019 May 22;10(5):2893-2905.
7. Fisetin reduces methylglyoxal-dependent protein glycation and reduces diabetes complications, according to Maher P, Dargusch R, Ehren JL, Okada S, Sharma K, and Schubert D. PLoS One. 2011 Jun 9;6(6):e21226.
8. Zhang X, Huang H, Yang T, Ye Y, Shan J, Yin Z, Luo L, Xu S, Liu C, Lai W, Stoner GD, Yao R. Fisetin hinders UVB-instigated cutaneous irritation and photocarcinogenesis through guideline of NF-κB flagging. Carcinogenesis. 2015 May;36(5):605-18.
9. Gracious, J., Lee, J. S., Ko, J., Ye, S. K., Jung, J. C., Baek, W. K., ... and Lee, B. J. (2018). Fisetin represses hyperglycemia-incited proinflammatory cytokine creation by epigenetic components. Proof based reciprocal and elective medication, 2018.
10. Maher P, Marshal B, Goldenzweig A, Druzhyna N, Knyazev Y, Gutman R, Flugelman MY, Lai W. Fisetin forestalls diabetic cardiomyopathy through Nrf2 subordinate increase of hostile to oxidant safeguard components. J Physiol Pharmacol. 2014 Apr;65(2):157-65.
11. Arai Y, Watanabe S, Kimira M, Shimoi K, Mochizuki R, Kinae N. Dietary admissions of flavonols, flavones and isoflavones by Japanese ladies and the opposite connection between's quercetin admission and plasma LDL cholesterol fixation. J Nutr. 2000 Sep;130(9):2243-50.
12. Touil YS, N. Touil, F. Boulinguez, H. Saighi, A. Regazzetti, D. Scherman, and GG Chabot Fisetin attitude and digestion in mice: Geraldol has been identified as an active metabolite. Biochem Pharmacol. 2011 Oct 1;82(7):1731-9.
13. Currais A, Earlier M, Dargusch R, Armando A, Ehren J, Schubert D, Quehenberger O, Maher P. Fisetin decreases the effect of maturing and sickness on mind capability: a randomized, twofold visually impaired, fake treatment controlled clinical preliminary. Maturing (Albany NY). 2018 Oct 3;10(10):2449-2456.
14. Touil YS, Auzeil N, Boulinguez F, Saighi H, Regazzetti A, Scherman D, Chabot GG. Fisetin attitude and digestion in mice: ID of geraldol as a functioning metabolite. Biochem Pharmacol. 2011 Oct 1;82(7):1731-9.
15. Currais A, Earlier M, Dargusch R, Armando A, Ehren J, Schubert D, Quehenberger O, Maher P. Fisetin lessens the effect of maturing and infection on cerebrum capability: a placebo-controlled, randomized, double-blind clinical trial. Maturing (Albany NY). 2018 Oct 3;10(10):2449-2456.
16. How fisetin mitigates the effects of age and disease on CNS function, Maher P. Front Biosci (Milestone Ed). 2015 Jun 1;20:947-60.