SupplementDuelSupplement head-to-head
All supplementsCategoriesPopularAbout

Supplement categories

Browse supplements by purpose — from creatine and protein for muscle gain to nootropics for focus and adaptogens for stress.

Protein8 items
Whey Protein Isolate, Whey Protein Concentrate, Casein Protein, …
Nootropic8 items
L-Theanine, Alpha-GPC, Lion's Mane Mushroom, …
Sleep7 items
Melatonin, Magnesium Glycinate, Magnesium L-Threonate, …
Vitamin7 items
Vitamin D3, Vitamin K2 (MK-7), Vitamin C, …
Amino Acid5 items
BCAA, Essential Amino Acids (EAA), L-Glutamine, …
Performance5 items
Caffeine, Beta-Alanine, Taurine, …
Adaptogen4 items
Ashwagandha, Panax Ginseng, Tongkat Ali, …
Mineral4 items
Zinc, Iron Bisglycinate, Selenium (Selenomethionine), …
Creatine3 items
Creatine Monohydrate, Creatine HCL, Kre-Alkalyn (Buffered Creatine)
Omega / Fatty Acid3 items
Fish Oil (Omega-3 EPA/DHA), Krill Oil, Algae Omega-3
Joint & Recovery3 items
Glucosamine Sulfate, Curcumin (with Piperine), MSM (Methylsulfonylmethane)
Heart2 items
Berberine, CoQ10 (Ubiquinol)
Immune2 items
Quercetin, NAC (N-Acetyl Cysteine)
Hormone2 items
Resveratrol, DHEA
Gut Health1 items
Probiotic (Multi-Strain)
SupplementDuel

Side-by-side supplement comparisons covering dosing, evidence, effects, side effects, price, and more — for every popular supplement, vitamin, mineral, and nootropic.

All supplementsCategoriesPopular comparisonsAboutDisclaimerPrivacy

Information on SupplementDuel is for general guidance only and is not medical advice. Individual responses to supplements vary, and interactions with medications can be serious. Always consult a qualified physician, registered dietitian, or pharmacist before starting, stopping, or changing any supplement, especially if you are pregnant, breastfeeding, taking prescription medication, or managing a chronic condition.

© 2026 SupplementDuel. All rights reserved.