Reviews & Comparisons

Olly vs Vitafusion: both gummy multis skip iron and run light on minerals. Olly wins on flavor and targeted blends, Vitafusion on price. Label math inside.

Equate vs Spring Valley vitamins: Equate is Walmart’s OTC and compare-to line, Spring Valley its supplement shelf. Where SKUs overlap, buy on price per day.

Spring Valley vs Nature Made: the price gap mostly buys USP verification. Cheaper is fine for basic D3 or C, a real gamble for botanicals and blends.

Centrum vs Nature Made: Nature Made carries the USP Verified seal Centrum lacks, but Centrum’s Silver formula is the one tested in major clinical trials.

Nature Made vs Kirkland: both carry the USP seal on key products, but Nature Made verifies over 3x more SKUs while Kirkland costs far less per dose.

Tru Niagen vs Elysium Basis: both raise NAD+ via nicotinamide riboside. Tru Niagen gives more NR per dollar; Basis adds pterostilbene at a premium.

ZBiotics vs Cheers: one is an engineered gut probiotic, the other a 1,200 mg DHM liver formula. Neither has a published human hangover trial. Here’s the math.

MegaFood Blood Builder vs Thorne Iron Bisglycinate: both use gentle 25-26 mg iron, Thorne is cheaper per mg, Blood Builder has the human trial.

Re-Lyte vs LMNT compared: LMNT packs 1000 mg sodium per stick at $1.50; Re-Lyte gives 810 mg plus double the potassium for about half the price.

Best CGM for non-diabetics in 2026: only Stelo and Lingo are sold OTC. What healthy glucose really looks like, where sensors mislead, and who should skip one.