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Acai Berry (1)
Acetyl-L-Carnitine Supplements (9)
Alginate Supplements (For Reflux) (4)
Aloe Juices, Gels, and Supplements (1)
Alpha Lipoic Acid Supplements (7)
Apple Cider Vinegar (8)
Ashwagandha Supplements (25)
Astaxanthin Supplements (5)
Avocado Oil (3)
B Vitamin Supplements (165)
Berberine Supplements (10)
Bone Broth (2)
Calcium Supplements (41)
CBD & Hemp Extract Supplements (55)
Chia Seed (2)
Cholesterol-Lowering Supplements (Sterols/Stanols and Policosanol) (11)
Choline Supplements (18)
Chromium Supplements (1)
Cinnamon Supplements and Spices (12)
CLA Supplements (2)
Cocoa Powders, Dark Chocolate, Extracts, Nibs & Supplements (58)
Coconut and MCT Oils (13)
Coconut Waters (1)
Collagen Supplements (35)
CoQ10 and Ubiquinol Supplements (44)
Cranberry Juices and Supplements (15)
Digestive Enzymes (10)
Echinacea Supplements (3)
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Electrolytes (3)
Essential Oils (4)
Evening Primrose & Flaxseed (ALA/GLA) (10)
Extra Virgin Olive Oil (29)
Fish Oil /Omega-3 Fatty Acid Supplements (226)
Flaxseed (8)
Fruits, Veggies, and Other Greens Supplements (12)
GABA Supplements (2)
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Green Tea Supplements and Drinks (55)
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Huperzine A Supplements (2)
Inactive Ingredients (10)
Iron Supplements (36)
Joint Health for Animals (11)
Joint Health Supplements (17)
Kelp (Supplements) (4)
Lactose Intolerance Products (1)
L-Arginine Supplements (21)
Lion's Mane and Chaga (7)
Low-Dose Lithium Supplements (5)
L-Theanine Supplements (7)
L-tryptophan and 5-Hydroxy-L-tryptophan (5-HTP) (4)
Lycopene Supplements (7)
Maca Supplements (2)
Magnesium Supplements (52)
Melatonin Supplements (68)
Menopause Supplements (18)
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Multivitamin and Multimineral Supplements (38)
Muscle & Workout Supplements (Creatine and BCAAs) (28)
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)
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Prebiotics (6)
Probiotics (124)
Prostate Supplements (Saw Palmetto and Beta-Sitosterol) (11)
Protein Powders (68)
Psyllium Fiber Supplements (9)
Quercetin & Rutin Supplements (12)
Red Yeast Rice Supplements (21)
Reishi Mushroom Supplements (9)
Resveratrol (Red Wine, Knotweed and Other Sources) (16)
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Sexual Enhancers (2)
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Water Filter Pitchers (17)
Weight Loss Supplements (7-Keto DHEA, Forskolin and Stimulant Blend Supplements) (3)
Wellbutrin vs. Generic Bupropion (2)
Zinc Supplements and Lozenges (26)
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L-Theanine Supplements

L-theanine for Cognition?

October 10, 2023
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Does taking L-theanine (a compound that occurs naturally in tea) improve attention or cognition in healthy men and women? Find out in the What It Does section of our L-theanine Supplements Review, which includes our Top Picks for L-theanine.

Also see: Do any supplements, foods or lifestyle modifications help with brain function, like memory and cognition?

Solgar L-Theanine Approved

May 16, 2023
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Solgar L-Theanine 150 mg was recently tested and Approved through our voluntary Quality Certification Program and was added to our L-Theanine Supplements Review.

L-Theanine for Stress?

February 08, 2022
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Can L-theanine supplementation reduce stress during demanding tasks? See the latest evidence in the What It Does section of our L-Theanine Supplements Review.

L-Theanine for Sleep and Cognition?

October 04, 2019
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Several studies have evaluated whether a single dose of L-theanine (found in green tea) can reduce stress and anxiety. A new study has evaluated the effect of L-theanine when taken daily for several weeks. See the results in the What It Does section of the L-Theanine Supplements Review. Also see our top choices for L-Theanine.

Theanine for Anxiety?

February 04, 2019
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Theanine is promoted as an anxiety-reducing supplement, but does it really work? See results of a recent study in the What It Does section of the L-theanine Supplements Review. Also see our top choices for L-theanine supplements.

CoQ10 for Wrinkles

September 10, 2016
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Taking a daily dose of CoQ10 may help to reduce facial wrinkles in older women, according to a preliminary study. Get the details and learn more about CoQ10 supplements in the "What It Does" section of the CoQ10 Supplements Review >>

Cocoa for Wrinkles?

November 23, 2015
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A study in older women found that drinking a high-flavanol cocoa drink each day increased skin elasticity. And while wrinkles deepened among those drinking a placebo, they stayed stable in the cocoa-drinking group. For details about the amount of cocoa consumed (and its flavanol content), as well as our tests of flavanols (and contaminants) in popular cocoa powders and chocolates, see the Cocoa Powders, Dark Chocolate, Extracts, Nibs, & Supplements Review >>