Supplements
By Dr. David Taylor, MD, PhD · 33 articles
Supplements are regulated differently from medicines. The FDA does not approve them for safety or effectiveness before they are sold, so the claims on the label have not been checked by the agency. That is why I put the most weight on third-party testing seals such as USP or NSF, on the form and dose of the nutrient, and on whether the research supports the use printed on the bottle.
The hub is grouped by goal: vitamins and minerals, probiotics and gut health, sleep and stress, heart and joint, and protein and hydration. If you are new to supplements, start with the guides on reading a label and timing your doses. A supplement makes the most sense when it fills a known gap, such as low B12 on a blood test. Check with your doctor first if you are pregnant or take blood thinners or thyroid medicine.
Vitamins & Minerals
7 Best Calcium Supplements of 2026
Calcium supplements for bone health and osteoporosis. Carbonate vs citrate, tablet vs gummy vs liquid, and USP-verified picks with vitamin D, compared.
7 products reviewed · Updated Oct 18, 2026
7 Best B12 Supplements of 2026
B12 supplements for vegans, seniors and deficiency. Methylcobalamin vs cyanocobalamin, sublingual vs capsule, and USP or NSF-certified picks compared.
7 products reviewed · Updated Nov 10, 2026
10 Best Vitamin K2 Supplements of 2026
Vitamin K2 supplements compared: MK-7 vs MK-4, all-trans MenaQ7 purity, D3 and K2 combos, and the clinical bone dose for osteoporosis, by a physician.
10 products reviewed · Updated Oct 18, 2026
7 Best Iron Supplements of 2026
Iron supplements for anemia, pregnancy and women. Ferrous sulfate vs bisglycinate, tablets vs liquids vs gummies, and a pick that is gentler on the gut.
7 products reviewed · Updated Oct 18, 2026
8 Best Multivitamins for Women of 2026
Multivitamins for women compared: gummies, tablets and whole-food capsules by iron content, folate form and age, with picks for women over 40 and over 50.
8 products reviewed · Updated Nov 1, 2026
7 Best Biotin Supplements of 2026
Biotin supplements for hair and nails, with a doctor's honest take on dosing, lab test interference, who actually needs biotin, and our top picks.
7 products reviewed · Updated Oct 31, 2026
9 Best Eye Vitamins of 2026
Eye vitamins compared: AREDS 2 for macular degeneration, lutein picks and dry eye omega-3, and who actually benefits. PreserVision AREDS 2 tops our list.
9 products reviewed · Updated Oct 30, 2026
9 Best Sea Moss Supplements of 2026
Sea moss supplements compared: capsules, gel, gummies and powder by sourcing, dose, and iodine and thyroid safety, with Nutrivein Organic as our top pick.
9 products reviewed · Updated Oct 28, 2026
7 Best Zinc Supplements of 2026
Zinc supplements compared: picolinate, bisglycinate, gluconate and lozenges by absorption, dose and copper balance, with picks for colds, men and women.
7 products reviewed · Updated Oct 25, 2026
7 Best Prenatal Vitamins of 2026
Prenatal vitamins compared: methylfolate vs folic acid, chelated iron, DHA and third-party testing, with picks for nausea, vegans and iron-free gummies.
7 products reviewed · Updated Oct 22, 2026
The Best Vitamin B Complex Supplements of 2026
Vitamin B complex supplements with B6 doses checked against the upper limit, methylated vs folic acid forms, and picks for women and seniors. Thorne leads.
14 products reviewed · Updated Oct 20, 2026
Iron Supplements and Constipation: How to Prevent It
Why iron supplements cause constipation and how to prevent it: alternate-day dosing, the gentlest iron forms, timing rules, and what to do if you're backed up.
Guide · Updated Aug 12, 2026
Essential Vitamins and Supplements for Seniors
The vitamins and supplements that matter after 60: B12, vitamin D, calcium, magnesium, omega-3 and protein, with senior RDAs, interactions and what to skip.
Guide · Updated Jul 22, 2026
Probiotics & Gut Health
7 Best Probiotics of 2026
Probiotics for bloating, IBS, diarrhea, gas and constipation, compared by CFU count, strains, delivery system and clinical evidence. A physician's picks.
7 products reviewed · Updated Nov 10, 2026
Best Probiotics for Kids of 2026
Probiotics for kids compared by pediatric strain, CFU, age range and format, for constipation, diarrhea after antibiotics, immunity and toddlers.
11 products reviewed · Updated Nov 12, 2026
7 Best Fiber Supplements of 2026
Fiber supplements compared: psyllium vs wheat dextrin, IBS and SIBO cautions, drug-timing rules and how to ramp up the dose. Metamucil tops our list.
7 products reviewed · Updated Nov 9, 2026
Best Vaginal Probiotics of 2026
Vaginal probiotics compared by strain designation, CFU, format and honest evidence, including suppositories. Jarrow Fem-Dophilus tops our 14 picks.
14 products reviewed · Updated Nov 6, 2026
Best Probiotics for Women of 2026
Probiotics for women compared by CFU, named strains, delivery capsule and honest tolerance data. Physician's CHOICE tops our 12 picks for 2026.
12 products reviewed · Updated Oct 31, 2026
Probiotics vs Prebiotics: What's the Difference?
Probiotics are live bacteria; prebiotics are the fibers that feed them. An MD compares strains, food sources, dosing and who should avoid each.
Guide · Updated Nov 9, 2026
Sleep & Stress
8 Best Melatonin Supplements of 2026
Melatonin matched to your sleep problem: USP-verified tablets, gummies, extended-release and capsules for falling asleep, staying asleep and jet lag.
8 products reviewed · Updated Nov 6, 2026
10 Best L-Theanine Supplements of 2026
L-theanine supplements for sleep, anxiety, stress and focus, compared by dose, branded Suntheanine form, third-party testing and drug interactions.
10 products reviewed · Updated Nov 9, 2026
7 Best Ashwagandha Supplements of 2026
Ashwagandha supplements for stress, sleep and testosterone. KSM-66, Sensoril, organic and gummy formulas compared by withanolide content, dose and evidence.
7 products reviewed · Updated Sep 30, 2026
Melatonin vs Magnesium for Sleep: How to Choose
Melatonin vs magnesium for sleep: how each works, the clinical evidence, dosing, side effects and drug interactions, and how to choose for your sleep problem.
Guide · Updated Apr 10, 2026
Heart & Joint
7 Best CoQ10 Supplements of 2026
CoQ10 supplements compared: ubiquinone vs ubiquinol, statin support, dose, absorption and third-party certification. Qunol Ultra is our top pick.
7 products reviewed · Updated Oct 31, 2026
13 Best NAC Supplements of 2026
NAC supplements compared by dose, cost per serving and third-party testing, with liver and lung picks, and the FDA rules that briefly pulled NAC off Amazon.
13 products reviewed · Updated Nov 9, 2026
7 Best Turmeric Supplements of 2026
Turmeric supplements compared by curcumin dose, bioavailability, form and third-party testing, with black pepper and ginger picks for joint support.
7 products reviewed · Updated Oct 27, 2026
8 Best Collagen Supplements of 2026
Collagen supplements compared: powders, peptides, liquids and gummies by collagen type, source, dose and third-party testing. Sports Research tops our list.
8 products reviewed · Updated Oct 18, 2026
Turmeric and Curcumin: Benefits and Dosage
Turmeric and curcumin benefits and dosage: what trials show by condition, trial doses vs EFSA limits, absorption, liver injury risk and drug interactions.
Guide · Updated Oct 27, 2026
Supplements for Joint Health: What the Research Says
Glucosamine, chondroitin, turmeric, omega-3, collagen, boswellia and more for joint pain: what the trials show, doses, and drug interactions to know.
Guide · Updated May 12, 2026
Protein & Hydration
9 Best Protein Powders for Seniors of 2026
Protein powders for seniors to preserve muscle, with picks for easy digestion, diabetes, plant-based diets and appetite loss, plus dose and safety guidance.
9 products reviewed · Updated Oct 26, 2026
7 Best Electrolyte Powders of 2026
Electrolyte powders compared by sodium dose and sugar, with picks for athletes, keto, fasting and illness recovery. LMNT Zero Sugar is our top pick.
7 products reviewed · Updated Nov 11, 2026
How to Choose and Take Supplements
Best Time to Take Supplements: A Doctor's Schedule
The best time to take supplements depends on food, mineral conflicts and your medications. Dr. David Taylor gives a timing table and a full-day schedule.
Guide · Updated Sep 16, 2026
How to Read a Supplement Label
How to read a Supplement Facts panel: serving size math, %DV, elemental mineral weights, proprietary blends, upper limits and what third-party seals verify.
Guide · Updated Aug 19, 2026