Should I take a multivitamin at all?

The trial evidence on hard endpoints is mixed. The Physicians' Health Study II (Gaziano 2012, JAMA) reported an 8% reduction in cancer incidence over 11 years on a daily multivitamin, but no effect on cardiovascular events. The COSMOS trial (Yeung 2023, Am J Clin Nutr) reported modest cognitive benefit. The opposing evidence: most US adults consuming a varied diet meet RDA for the nutrients a multi provides, and a multi adds zero benefit to a deficient diet that should be addressed at the meal level. The reasonable use case: insurance against rotation-day micronutrient gaps, particularly for vitamin D, B12 (especially in plant-based diets), folate (especially in pregnant and pre-pregnant women), and omega-3 (separate supplement, see best-fish-oil).

What are methylated B-vitamins and do I need them?

B-vitamin methylation is the activation step that converts dietary forms into the bioactive cofactors (5-MTHF folate from folic acid; methylcobalamin from cyanocobalamin). In adults without MTHFR-gene polymorphisms (~50% of the population), the body methylates standard forms efficiently and synthetic folic acid + cyanocobalamin work fine. In adults with MTHFR C677T or A1298C polymorphisms, the methylation step is reduced 30–70% and methylated forms bypass the bottleneck. Without genetic testing, the methylated forms are insurance with no downside. The cost premium is small at $0.07–$0.30 per day delta.

Adult men, postmenopausal women, and most non-pregnant adults do not have iron deficiency and excess iron is pro-oxidant. The Iowa Women's Health Study (Mursu 2011, Arch Intern Med) reported increased mortality risk associated with iron-supplement use in older women. Iron-containing multivitamins are appropriate for menstruating women and pregnant women under medical supervision. Iron-free multis (Thorne Basic, Centrum Adult Plus) are the default for everyone else.

What about AG1 and the greens-powder category?

AG1 is a multivitamin with an adaptogen blend repackaged as a daily greens powder, priced at the premium end of the market. The coverage profile is competitive with Thorne Basic Nutrients but at 4× the cost. The marketing case for the differentiator (gut-health blend, adaptogens) is weakly supported by trial data at the doses delivered. For readers who already have an established daily-greens-drink habit, AG1 is a reasonable single-purchase that absorbs multiple supplement categories. For readers picking the best value-per-nutrient supplement: Thorne or Pure Encapsulations beats it on every measurable axis.

How does a multi compare with separate single-nutrient supplements?

Single-nutrient supplements address documented deficiencies (vitamin D in low-sunlight latitudes, B12 in plant-based diets, iron in menstruating women with confirmed low ferritin). Multivitamins are the broad-coverage insurance for un-tested gaps. The reasonable stack: multivitamin daily + vitamin D 1,000–4,000 IU based on serum 25-OH levels + EPA/DHA 500–2,000 mg from fish oil. Separate magnesium glycinate at 200–400 mg if sleep is the goal (most multis under-dose magnesium). Beyond that, single-nutrient supplements should follow blood work, not marketing.

Comparison · ranked· Supplements

Best multivitamin, 2026: ranked by nutrient coverage per dollar

Evidence reviewed·05 sources cited·Dr. Soraya Khan, RDN

Tier B evidence

Eight multivitamins scored on the 13 RDA-relevant nutrients an actual diet typically under-delivers. Methylated B-vitamins, the iron-versus-no-iron split, and the cost-per-day math.

Vol. 1Issue 042026-04-29larderlab.com

Educational use only. Larderlab content is educational. Pantry, macro, and supplement guidance is not a substitute for medical advice. Consult a registered dietitian or your physician before making material changes to your diet or supplementation.

DisclosureLarderlab tests and recommends products independently. We sometimes earn a commission when you buy through our links, rankings are decided before the affiliate relationship is checked, not after.

§ 1 · Editor's pick, Best evidence-based methylated multi at reasonable cost

Confidence: High

Thorne Basic Nutrients 2/Day

Methylated B-vitamins (5-MTHF folate, methylcobalamin B12, the bioactive forms that bypass the MTHFR-genotype-dependent activation step), iron-free, NSF Certified for Sport, ~$0.30/day at 60-day pricing. The 2-capsule format keeps the dose splittable across morning and evening for steady plasma levels. Outranks AG1 on nutrient-per-dollar at 4× lower cost; outranks Costco Kirkland on B-vitamin form quality.

Check price · AmazonAffiliate link · funds the dose testing

§ 2 · Systems table

Every product, ranked.

8 rows · click to sort

Systems tableDefault sort: rank (editorial). Click any column header to re-sort.

8 rows · click a ▲ header to sort

#				Notes	Confidence
01	Thorne Basic Nutrients 2/Day	Best methylated multi	01	Methylated B-vitamins (5-MTHF, methylcobalamin), bioactive vitamin K2, NSF Certified for Sport. Iron-free formulation suitable for menopause and male prescribing contexts. ~$0.30/day at 60-capsule pricing. Direct from Thorne or via Amazon authorized listings only, counterfeit incidence on this brand is meaningful.	High
02	Pure Encapsulations O.N.E. Multivitamin	Best single-pill methylated multi	02	1-pill-per-day form factor with methylated B-vitamins. Trace lutein + zeaxanthin (eye health) + alpha lipoic acid. ~$0.40/day. Useful for readers who won't reliably take a 2-capsule split. Same NSF-grade quality control as Thorne.	High
03	Costco Kirkland Daily Multi	Best $/day mass-market	03	USP-verified, broad RDA coverage, ~$0.07/day. Uses cyanocobalamin (B12) and folic acid (not methylated forms), adequate for adults without MTHFR-pathway considerations. The cheapest defensible multi on the page; ~75% of the value of premium methylated multis at 25% of the cost.	High
04	Garden of Life Vitamin Code Men's / Women's 50+	Best whole-food-derived multi	04	Whole-food-derived nutrient sources rather than synthetic isolates. Methylated B-vitamins, raw + uncooked formulation. Higher cost (~$0.55/day) reflects the whole-food sourcing, clinically equivalent to synthetic methylated alternatives but defensible for readers who prefer whole-food matrices.	Medium
05	Optimum Nutrition Opti-Men / Opti-Women	Best for active adults with stacking goals	05	Multi + amino-acid + antioxidant stack in single tablet. Higher dose iron in Opti-Women (a feature for menstruating women, a flag for men). ~$0.20/day. Reasonable choice for athletes who would otherwise stack a multi with separate aminos. NSF Certified for Sport.	Medium
06	Ritual Essential Multivitamin (Women's 18+, Men's 18+)	Best clean-label brand-forward	06	Traceable ingredient sourcing, methylated folate, iron-only-where-needed (Women's 50+ removes iron). $0.86/day. Brand premium reflects the traceability + DTC packaging. Coverage profile is solid; the cost sits well above what equivalent-coverage Thorne delivers.	Medium
07	AG1 (Athletic Greens)	Most-marketed multi in the comparison set	07	Greens-powder formulation with vitamin + mineral blend + adaptogen complex. ~$1.30/day at the subscription price. Coverage profile is broadly comparable to Thorne Basic Nutrients at roughly 4× the cost. The marketing premium is the variable; the underlying nutrition is competitive but not differentiated enough to justify the price gap. We rank it for completeness, not endorsement.	Medium
08	Centrum Silver / Adult	Most-prescribed retail multi	08	Pharmacy-default multi; widely studied in retrospective cohorts. Coverage is broad but uses cyanocobalamin and folic acid (not methylated forms). $0.10/day. The default choice for risk-averse readers; clinically defensible but not the optimization choice.	Medium

Methodology

§ 4 / spec

How this was specified

01Inputs measured: Retail price (dated) · label claim · Certificate of Analysis · third-party test (Informed Sport / NSF / ConsumerLab / Clean Label) · leucine per serving from COA, not marketing.
02Protocols tested: Per-kg target from four literature ranges (IOM RDA, Phillips 2017, Morton 2018, ISSN). Brands scored against Moore 2015 leucine-per-dose threshold (~0.4 g/kg).
03Cost-basis verified: $/gram of protein and $/gram of leucine at warehouse pricing (Costco), mail-order (Amazon), and DTC retail. Re-checked quarterly, flagged when drift exceeds 15%.
04Confidence level: High on ranked order. Medium on absolute $/g (prices drift). Low on serving-size claims where COA is older than 18 months, flagged [VERIFY].

§ 5 · Questions

What people ask us most.

Should I take a multivitamin at all?: The trial evidence on hard endpoints is mixed. The Physicians' Health Study II (Gaziano 2012, JAMA) reported an 8% reduction in cancer incidence over 11 years on a daily multivitamin, but no effect on cardiovascular events. The COSMOS trial (Yeung 2023, Am J Clin Nutr) reported modest cognitive benefit. The opposing evidence: most US adults consuming a varied diet meet RDA for the nutrients a multi provides, and a multi adds zero benefit to a deficient diet that should be addressed at the meal level. The reasonable use case: insurance against rotation-day micronutrient gaps, particularly for vitamin D, B12 (especially in plant-based diets), folate (especially in pregnant and pre-pregnant women), and omega-3 (separate supplement, see best-fish-oil).
What are methylated B-vitamins and do I need them?: B-vitamin methylation is the activation step that converts dietary forms into the bioactive cofactors (5-MTHF folate from folic acid; methylcobalamin from cyanocobalamin). In adults without MTHFR-gene polymorphisms (~50% of the population), the body methylates standard forms efficiently and synthetic folic acid + cyanocobalamin work fine. In adults with MTHFR C677T or A1298C polymorphisms, the methylation step is reduced 30–70% and methylated forms bypass the bottleneck. Without genetic testing, the methylated forms are insurance with no downside. The cost premium is small at $0.07–$0.30 per day delta.
Why iron-free?: Adult men, postmenopausal women, and most non-pregnant adults do not have iron deficiency and excess iron is pro-oxidant. The Iowa Women's Health Study (Mursu 2011, Arch Intern Med) reported increased mortality risk associated with iron-supplement use in older women. Iron-containing multivitamins are appropriate for menstruating women and pregnant women under medical supervision. Iron-free multis (Thorne Basic, Centrum Adult Plus) are the default for everyone else.
What about AG1 and the greens-powder category?: AG1 is a multivitamin with an adaptogen blend repackaged as a daily greens powder, priced at the premium end of the market. The coverage profile is competitive with Thorne Basic Nutrients but at 4× the cost. The marketing case for the differentiator (gut-health blend, adaptogens) is weakly supported by trial data at the doses delivered. For readers who already have an established daily-greens-drink habit, AG1 is a reasonable single-purchase that absorbs multiple supplement categories. For readers picking the best value-per-nutrient supplement: Thorne or Pure Encapsulations beats it on every measurable axis.
How does a multi compare with separate single-nutrient supplements?: Single-nutrient supplements address documented deficiencies (vitamin D in low-sunlight latitudes, B12 in plant-based diets, iron in menstruating women with confirmed low ferritin). Multivitamins are the broad-coverage insurance for un-tested gaps. The reasonable stack: multivitamin daily + vitamin D 1,000–4,000 IU based on serum 25-OH levels + EPA/DHA 500–2,000 mg from fish oil. Separate magnesium glycinate at 200–400 mg if sleep is the goal (most multis under-dose magnesium). Beyond that, single-nutrient supplements should follow blood work, not marketing.

What would change our mind

A published Certificate of Analysis from a ranked brand that contradicts the label claim we scored against. An independent lab result (Clean Label, ConsumerLab) finding heavy-metal or amino-spiking failures on a current top pick. A peer-reviewed meta-analysis that shifts the leucine-per-dose threshold. Any of those triggers a dated revision within a week.

Sources

Every claim, cited.

05 refs

The Larderlab Team · byline

The Larderlab Team builds evidence-led frameworks for eating, lifting, and stocking a kitchen. We cite every claim. We publish the spreadsheet when possible. We buy what we review at retail price. When new data lands, we revise with a dated note.

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