ConsumerLab.com uses JavaScript to provide the best possible experience for our content, but your browser has it disabled. Learn how to enable it here.

Reviews & Articles

Membership & Subscription

About ConsumerLab.com

About Testing

News

  1. Home
  2. / Clinical Updates

Clinical Updates

Search
Acai Berry (1)
Acetyl-L-Carnitine Supplements (9)
Alginate Supplements (For Reflux) (3)
Aloe Juices, Gels, and Supplements (1)
Alpha Lipoic Acid Supplements (6)
Apple Cider Vinegar (8)
Ashwagandha Supplements (23)
Astaxanthin Supplements (4)
Avocado Oil (3)
B Vitamin Supplements (156)
Berberine Supplements (6)
Bone Broth (2)
Calcium Supplements (40)
CBD & Hemp Extract Supplements (53)
Chia Seed (2)
Cholesterol-Lowering Supplements (Sterols/Stanols and Policosanol) (9)
Choline Supplements (18)
Chromium Supplements (1)
Cinnamon Supplements and Spices (12)
CLA Supplements (2)
Cocoa Powders, Dark Chocolate, Extracts, Nibs & Supplements (53)
Coconut and MCT Oils (10)
Coconut Waters (1)
Collagen Supplements (31)
CoQ10 and Ubiquinol Supplements (42)
Cranberry Juices and Supplements (14)
Digestive Enzymes (8)
Echinacea Supplements (3)
Elderberry Supplements (4)
Electrolytes (3)
Essential Oils (3)
Evening Primrose & Flaxseed (ALA/GLA) (9)
Extra Virgin Olive Oil (28)
Fish Oil /Omega-3 Fatty Acid Supplements (215)
Flaxseed (5)
Fruits, Veggies, and Other Greens Supplements (8)
GABA Supplements (2)
Garcinia Cambogia (HCA) Supplements (6)
Garlic Supplements (12)
Ginger Supplements (13)
Ginkgo Supplements (6)
Ginseng Supplements (10)
Green Coffee Bean Extract Supplements (2)
Green Tea Supplements and Drinks (49)
Hoodia Supplements (1)
Huperzine A Supplements (2)
Inactive Ingredients (8)
Iron Supplements (28)
Joint Health for Animals (11)
Joint Health Supplements (17)
Kelp (Supplements) (4)
Lactose Intolerance Products (1)
L-Arginine Supplements (18)
Lion's Mane and Chaga (7)
Low-Dose Lithium Supplements (5)
L-Theanine Supplements (6)
L-tryptophan and 5-Hydroxy-L-tryptophan (5-HTP) (4)
Lycopene Supplements (7)
Maca Supplements (2)
Magnesium Supplements (48)
Meal Replacement (1)
Melatonin Supplements (61)
Menopause Supplements (17)
Milk Thistle Supplements (3)
Multivitamin and Multimineral Supplements (36)
Muscle & Workout Supplements (Creatine and BCAAs) (26)
NAC (N-Acetyl Cysteine) Supplements (22)
NAD Boosters (NAD+/NADH, Nicotinamide Riboside, and NMN) (12)
Nutrition Bars (3)
Oat Cereals (11)
Plant Based Milks (4)
Pomegranate Juice and Supplements (1)
Potassium Iodide/Iodate (Radioprotective Agents) (1)
Potassium Supplements (13)
Prebiotics (4)
Probiotics (114)
Prostate Supplements (Saw Palmetto and Beta-Sitosterol) (9)
Protein Powders (65)
Psyllium Fiber Supplements (7)
Quercetin & Rutin Supplements (11)
Red Yeast Rice Supplements (21)
Reishi Mushroom Supplements (9)
Resveratrol (Red Wine, Knotweed and Other Sources) (16)
SAMe Supplements (3)
Selenium Supplements (10)
Sexual Enhancers (2)
St. John's Wort Supplements (3)
Tuna, Salmon & Sardines (22)
Turmeric and Curcumin Supplements and Spices (94)
Valerian Supplements (1)
Vision Supplements with Lutein and Zeaxanthin (22)
Vitamin A Supplements (7)
Vitamin C (39)
Vitamin D Supplements (290)
Vitamin E Supplements (18)
Vitamin K Supplements (12)
Water Filter Pitchers (10)
Weight Loss Supplements (7-Keto DHEA, Forskolin and Stimulant Blend Supplements) (3)
Wellbutrin vs. Generic Bupropion (2)
Zinc Supplements and Lozenges (25)
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011

Quercetin & Rutin Supplements

Quercetin and Antivirals

3/31/2023
Favorited Not Favorited

Be aware that quercetin might reduce the effectiveness of some antivirals, including an antiviral in Paxlovid used to treat COVID-19. Get the details in the Concerns and Cautions section of our Quercetin Supplements Review, which includes information about other potential interactions with quercetin, as well as our Top Picks among quercetin supplements.

Also see our CL Answer about Supplements for COVID-19.

Quercetin for Seasonal Allergies?

7/19/2022
Favorited Not Favorited

Did quercetin improve nasal and eye symptoms among people with seasonal allergies in recent study? Find out in the Seasonal Allergy section of our Quercetin Supplements Review.

Quercetin From Food or Supplements?

6/01/2022
Favorited Not Favorited

Is it more cost effective to get quercetin from food (as rutin) than supplements? See our answer in the Quercetin Review.

Most Quercetin Brands Fail Test

5/13/2022
Favorited Not Favorited

Twenty out of 24 brands of quercetin purchased on Amazon contained much less quercetin than listed in a recent analysis. For details by brand, see the Quality Concerns section of our Quercetin Review.

Quercetin for Severe COVID?

12/06/2021
Favorited Not Favorited
Does quercetin help people with severe COVID-19? See what a recent study suggests in the Viral Infections section of our Quercetin Supplements Review. Also see our Top Picks for quercetin.

Quercetin & COVID

11/04/2021
Favorited Not Favorited
Find out if quercetin helped people with early-stage COVID-19 in a recent study. Details are in the Viral Infections section of our Quercetin Supplements Review, which includes our test results and Top Picks among quercetin supplements.

Is Quercetin Safe?

3/30/2020
Favorited Not Favorited
Quercetin has been proposed as a treatment for a range of medical conditions, including COVID-19, but is it safe? Find out what studies have found, including results of a recent, small clinical trial, in the Concerns and Cautions section of the Quercetin Supplements Review. Also see our Top Picks for quercetin.