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 (7)
Apple Cider Vinegar (8)
Ashwagandha Supplements (23)
Astaxanthin Supplements (5)
Avocado Oil (3)
B Vitamin Supplements (162)
Berberine Supplements (9)
Bone Broth (2)
Calcium Supplements (41)
CBD & Hemp Extract Supplements (55)
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 (55)
Coconut and MCT Oils (12)
Coconut Waters (1)
Collagen Supplements (32)
CoQ10 and Ubiquinol Supplements (44)
Cranberry Juices and Supplements (15)
Digestive Enzymes (8)
Echinacea Supplements (3)
Elderberry Supplements (4)
Electrolytes (3)
Essential Oils (4)
Evening Primrose & Flaxseed (ALA/GLA) (10)
Extra Virgin Olive Oil (29)
Fish Oil /Omega-3 Fatty Acid Supplements (220)
Flaxseed (7)
Fruits, Veggies, and Other Greens Supplements (9)
GABA Supplements (2)
Garcinia Cambogia (HCA) Supplements (6)
Garlic Supplements (12)
Ginger Supplements (14)
Ginkgo Supplements (7)
Ginseng Supplements (10)
Green Coffee Bean Extract Supplements (2)
Green Tea Supplements and Drinks (54)
Hoodia Supplements (1)
Huperzine A Supplements (2)
Inactive Ingredients (10)
Iron Supplements (34)
Joint Health for Animals (11)
Joint Health Supplements (17)
Kelp (Supplements) (4)
Lactose Intolerance Products (1)
L-Arginine Supplements (20)
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 (51)
Melatonin Supplements (64)
Menopause Supplements (17)
Milk Thistle Supplements (3)
Multivitamin and Multimineral Supplements (37)
Muscle & Workout Supplements (Creatine and BCAAs) (26)
NAC (N-Acetyl Cysteine) Supplements (23)
NAD Boosters (NAD+/NADH, Nicotinamide Riboside, and NMN) (12)
Nutrition Bars (4)
Oat Cereals (11)
Plant Based Milks (6)
Pomegranate Juice and Supplements (1)
Potassium Iodide/Iodate (Radioprotective Agents) (1)
Potassium Supplements (13)
Prebiotics (6)
Probiotics (121)
Prostate Supplements (Saw Palmetto and Beta-Sitosterol) (10)
Protein Powders (68)
Psyllium Fiber Supplements (8)
Quercetin & Rutin Supplements (11)
Red Yeast Rice Supplements (21)
Reishi Mushroom Supplements (9)
Resveratrol (Red Wine, Knotweed and Other Sources) (16)
Saffron Supplements (1)
SAMe Supplements (3)
Selenium Supplements (11)
Sexual Enhancers (2)
St. John's Wort Supplements (3)
Taurine Supplements (1)
Tuna, Salmon & Sardines (23)
Turmeric and Curcumin Supplements and Spices (98)
Valerian Supplements (1)
Vision Supplements with Lutein, Zeaxanthin & AREDS2 Formulas (23)
Vitamin A Supplements (7)
Vitamin C (39)
Vitamin D Supplements (299)
Vitamin E Supplements (18)
Vitamin K Supplements (12)
Water Filter Pitchers (15)
Weight Loss Supplements (7-Keto DHEA, Forskolin and Stimulant Blend Supplements) (3)
Wellbutrin vs. Generic Bupropion (2)
Zinc Supplements and Lozenges (26)
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011

L-Arginine Supplements

Arginine & Cold Sores

9/08/2023
Favorited Not Favorited

Can arginine supplementation trigger cold sore outbreaks? Find out what research suggests in the Concerns and Cautions section of our Arginine Supplements Review.

Also see: Can any vitamins or minerals help prevent or reduce canker sores or cold sores?

Arginine Safety?

9/01/2023
Favorited Not Favorited

Are there safety concerns with taking L-arginine? There are with high doses, capsules, and if you’ve had a heart attack. Learn more in the Concerns and Cautions section of our Arginine Supplements Review. Also see our Top Picks among arginine products.

Throat Injury From L-Arginine

10/11/2022
Favorited Not Favorited

Be aware that L-arginine capsules may cause esophageal injury, as shown in a recent case. Get the details, as well as tips for avoiding this, in the Concerns and Cautions section of our L-Arginine Supplements Review.

Also see our CL Answer 6 Tips to Avoid Getting a Pill Stuck in Your Throat.

Does Arginine Improve Blood Flow?

7/22/2022
Favorited Not Favorited
L-arginine is often promoted to improve blood flow to muscle tissue, and so is L-citrulline (which is converted to L-arginine in the body). But a recent study adds more evidence that this is often not the case. See the details in the What It Does section our L-Arginine Product Review.

Citrulline for Heart Health?

7/12/2022
Favorited Not Favorited

Does supplementing with citrulline reduce blood pressure and improve heart function in people with heart failure? Find out in the Citrulline section of our L-Arginine Supplements Review (citrulline is converted to L-arginine in the body).

Arginine for Mild Cognitive Impairment?

4/15/2022
Favorited Not Favorited

Can supplementing with L-arginine help elderly people with mild cognitive impairment (MCI)? Find out what a recent study showed in the What It Does section of our L-Arginine Supplements Review.

Also see our CL Answer about other supplements for Memory and Cognition.

Citrulline for Strength?

9/13/2021
Favorited Not Favorited
Find out if citrulline supplementation improved muscle strength or endurance in older people in recent study. (This information is in the Citrulline section of our L-Arginine Supplements Review, as citrulline is converted to arginine in the body and it is often sold in combination with arginine).

L-Arginine for COVID?

9/13/2021
Favorited Not Favorited
Did L-arginine supplementation help people with severe COVID-related pneumonia? See what a new study found in the What It Does section of our L-Arginine Supplements Review.

Also see: Do any supplements help with the coronavirus (COVID-19)?

Pill-Induced Esophagitis

10/18/2019
Favorited Not Favorited
Several cases of esophagitis have been reported from taking supplements, including a recent case involving l-arginine capsules. For details, including tips on how to safely take pills, see the Concerns and Cautions section of the L-Arginine Supplements Review. Also see our Top Picks for L-Arginine.

Arginine for Men?

7/22/2019
Favorited Not Favorited
Does daily arginine supplementation enhance the effect of a popular prescription medication for men? See what a recent study found in the What It Does section of the L-Arginine Supplements Review. Also see our Top Picks for arginine.

Citrulline and Exercise

8/13/2018
Favorited Not Favorited
Several studies have evaluated citrulline (which the body converts to arginine) for enhancing athletic performance. Find out if it helps or not in the Citrulline section of the L-Arginine Review. Also, find out if L-arginine, itself, can help.

Can L-Arginine Cause Pancreatitis?

4/30/2018
Favorited Not Favorited
Although uncommon, there have been reports of acute pancreatitis occurring in conjunction with L-arginine use. Get the details and learn about other possible side effects of arginine in the Concerns and Cautions section of the L-arginine Supplements Review.

L-Arginine for Workouts?

3/16/2018
Favorited Not Favorited
A recent study assessed whether taking L-Arginine before a high-intensity workout decreased muscle soreness after the workout. Get the results and more details in the Exercise Endurance and Recovery section of the L-Arginine Supplements Review. (Also see our Top Picks among products).

Citrulline for Improving Exercise?

12/01/2017
Favorited Not Favorited
Citrulline, a compound which is converted to arginine in the body, is often added to workout supplements to improve exercise performance. But does it really help? See what a new study found in the "What It Does" section of the L-Arginine Supplements Review >> (Also see our Top Picks among L-arginine supplements.)