Customize Your Shopping Experience!

Please select the destination country, language, and currency you prefer.

Available Shipping Methods
Available Payment Methods
Added to Cart
Combo Discount:
View/Edit Cart Checkout
Cart Total:
Customers Also Bought:

Life Extension, Optimized Quercetin, 250 mg, 60 Veggie Caps (Discontinued Item)

By Life Extension

Our Price:
You Save:
$5.50 (25%)
Earn 10% Loyalty Credit ?


close button

The item is currently out of stock and replenishment is unconfirmed.

Out of Stock - Discontinued
  • Product Code: LEX-13096
  • UPC Code: 737870130963
  • Package Quantity: 60 Veggie Caps
  • Dimensions: 2.1 x 2.1 x 3.9 in, 0.15 lbs (0.07 kg)

Product Overview

  • For Longer Life
  • Food-Based Bioflavonoid Complex
  • Dietary Supplement

Optimized Quercetin

 Quercetin is a bioflavonoid that supports cellular health and function. In human cell culture studies, it has been shown to block the manufacture and release of inflammation-causing substances, which can help support a healthy immune response to the seasonally changing environment. It also helps promote a healthy cardiovascular system by preserving endothelial integrity and supporting healthy blood glucose levels for those already within normal range. Optimized Quercetin is a proprietary formulation that sets the "gold standard" for high-quality quercetin derived from a food-source blend.

Suggested Use

Read the entire label and follow the directions carefully prior to use.

Take one (1) capsule once or twice daily with or without food, or as recommended by a healthcare practitioner.

Other Ingredients

Microcrystalline cellulose, vegetable cellulose (capsule), silica maltodextrin, vegetable stearate.

  • Keep out of reach of children.
  • Do not exceed recommended dose.
  • Do not purchase if outer seal is broken or damaged.
  • When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.

Store tightly closed in a cool, dry place.

Visit Manufacturer's Website
Supplement Facts
Serving Size: 1 Vegetarian Capsule
  Amount Per Serving % DV
Vitamin C (from ascorbic and Camu Camu berry extract) 30 mg 50%
Optimized Quercetin Food Blend
(supplying 250 mg quercetin)
[Quercetin dihydrate buckwheat (Fagopyrum esculentum)
(sprout), apple (Pyrus malus) polyphenol extract (fruit), onion (Allium cepa L.) extract (bulb) (providing polyphenols)]
500 mg **
Camu Camu (Myrciaria dubia) extract (wildcrafted berry) 60 mg **
** Daily Value not established.

iHerb Customer Reviews

5 Stars
4 Stars
3 Stars
2 Stars
1 Stars

top notch

Posted by Reviewer3086463 on Aug 31, 2009

This quercetin is very good for allergies. I can tell the difference between this product and other brands. I take two twice a day in order to get 500mg twice a day. With another brand, 1000mg twice a day was comparable, and with another brand I had to take 500mg three times a day for same effect. Life Extension has not dissapointed me yet.

Was this review helpful to you?

14 people found the following review helpful


Posted by Reviewer2089770 on Oct 09, 2012

I have a dog with food sensitivities. I have read that quercetin can alleviate the symptoms by inhibiting histamine release. I have tried several brands, but the improvement was minor. The reviews for the LE brand claim that it is superior to all others. In general, I am sceptical of such reviews, but I took a chance. I am glad I did. Not only is it better than other brands of quercetin, it is a lot more effective than Histame (at least in the case of my dog). Thank you, LEF.

Was this review helpful to you?

4 people found the following review helpful

The best quercetin product I have tried

Posted by 5314020378583434866 on May 30, 2013

This is fantastic for clearing my stuffy sinuses, it starts working within 20 minutes of taking it. The dose is just right for me, one tablet a day and possibly another in the evening if my allergies are really bad. I have tried lots of other brands but this one just works!

Was this review helpful to you?

4 people found the following review helpful


Posted by Reviewer1788788 on Dec 20, 2009

Life Extension is a very good company and I trust their products completely. Helps my allergies and also good for blood pressure if you take enough of it. I take one to two caps a day.

Was this review helpful to you?

6 people found the following review helpful

Liking this so far

Posted by Reviewer1559362 on Nov 22, 2009

This seems to help with hay fever symptoms so far but need to take two capsules at a time, maybe twice a day. It is still early days though.

Was this review helpful to you?

3 people found the following review helpful

See All Reviews