to investigate if hesperetin is able to slow down aging and extend a healthy lifespan, we treated naturally aged mice started at 21-month old with dietary hesperetin and monitored their survival rate. Intriguingly, hesperetin significantly extends the lifespan of the aging mice (Fig. (Fig.1A).1A). The median lifespan of the hesperetin-treated WT mice was increased by 2.25 months (8.7%; from 25.95- to 28.2-month old) relative to Veh-treated WT mice (p = 0.04), with the maximum lifespan increase being 4.1 months (13.9%; from 29.5- to 33.6-month old).
Hesperetin, a flavanone class of citrus flavonoid, is a derivative of hesperidin found in citrus fruits such as oranges, grapes, and lemons. It has been extensively reported that hesperetin exerts neuroprotective effects in experimental models of neurodegenerative diseases.
The clinical application of Hst is still limited because its low water solubility and poor in vivo bioavailability issues might necessitate high doses of oral administration to overcome therapeutic concentration. Additionally, the Hst penetration to blood–brain barrier is another limitation in brain diseases treatment. However, to solve these limitations, new Hst delivery systems have been developed such as inclusion complexes with nanoparticles and cyclodextrins. These new Hst formulations should be standardized and tested clinically to ensure CV and neuroprotective effects. Also worth of note is that, well- designed clinical trials are pivotal to study the other poten- tial effects of Hst, already stated in preclinical studies. The safety, efficacy, and cheap availability of Hst make this molecule as a good candidate for the development of food supplements for the management of diseases related with oxidative stress and inflammatory status.
Poor bioavilability of hesperetin and hesperidin. Not water soluble. Per the following paper, “parallel supplementation with probiotics should be carried out to maximize the potential of the formulation.” More bioavailable formulations are in development.
Hesperidin reduces arterial stiffness in old mice to levels comparable to young mice:
Hesperidin is reputed to be an anticancer agent in “numerous cancer types”:
Well, I have tried almost every variety of supplements in my local health food store.
And, I am working on Amazon as well, happen to have a large bottle of Diosmin - Hesperidin 1000mg tablets on the shelf. It was recommended for leg circulation and blood pressure control.
I stopped taking it because my blood pressure is well under control because seldom registers above 120 systolic.
So, with rapamycin and my life-extending supplements, 30% here 20% there, etc., I will soon pass 100% and become Benjamin Button.
Hayashibara discusses published and corroborative unpublished rat and human studies to support their conclusion that ingested glucosyl hesperidin is first metabolized to hesperidin and then to hesperetin, which is subsequently absorbed. Hayashibara states that the exposure to hesperetin is 3 to 3.7-fold higher after the ingestion of glucosyl hesperidin relative to the exposure following the ingestion of equivalent amounts of hesperidin. Hayashibara concludes that glucosyl hesperidin is absorbed into and metabolized in the body by the same pathway as hesperidin, which provides a basis to incorporate hesperidin safety assessments into their glucosyl hesperidin safety assessment.
Interestingly, there are patents around this compound:
Prospective Grant of Exclusive License: Use of the Citrus Flavanones Hesperetin, Hesperidin, and Naringenin in Nutrition for Endothelial Function, Vascular Health, Diabetes, and Insulin Resistance
Thus, hesperidin and its active aglycone form, hesperetin, may be effective agents for the treatment of diabetes, obesity, metabolic syndrome, dyslipidemias, and their cardiovascular complications including hypertension, atherosclerosis, coronary heart disease, and stroke. This technology discloses methods for using a hesperetin or hesperidin composition to treat metabolic syndrome and insulin resistance. Also described is the use of the related citrus polyphenol, naringenin.
I’m waiting for the bioavailability issue to be addressed. As @Mac says, to duplicate the mouse doses with lifespan benefit (study) you’d have to take something on the order of 30g per day, so it seems unreasonable right now.
“I’m waiting for the bioavailability issue to be addressed. As @Mac says, to duplicate the mouse doses with lifespan benefit (study) you’d have to take something on the order of 30g per day, so it seems unreasonable right now.”
I think @Mac was referring to the study on reversing arterial stiffness. However, even if the average weight of the mouse strain and grams of daily food intake that he gave are reasonable estimates (3 grams of food/day and 30 gram mouse), his calculation is way off because you have to apply an interspecies dosage scaling factor. So he arrived at a daily human dose of 35 grams for a 70 kg human. And in actuality, you’d want to take 35 and divide by 12.3. So 35÷12.3 = 2.85 grams. (There are different formulas, but 12.3 is a typical factor for mouse to human scaling). Also, in the arterial stiffness study it doesn’t look like they tried a lower dosage, so it’s unclear how much lower the dosage can go while still getting this benefit.
In the lifespan study, they adminstered hesperetin at 100 mg/kg. So if you take this, divide by 12.3, and multiply by 70 for a 70 kg person, you get about 569 milligrams per day for a 70 kg person. Now, as far as what the equivalent is with “hesperidin”, I don’t know yet. In other words, if one group of people took 500 mg of hesperitin with a meal, and a second group ate the same meal with 500 mg of hesperidin, how serum levels of hesperetin compare after digestion? Maybe the answer is in the literature.
In the study below, 8 weeks of hesperidin at 500 mg/day improved muscle mass and reduced fat in cyclists when compared to placebo. Some supplement labels suggest 500 mg one or twice daily. I may try 500 mg with food every 12 hours (plus a good probiotic to improve bioavailability as suggested by researchers). But I’m still reading and researching.