vitamin-d
Vitamin D3 2000 IU
Kirkland Signature provides an exceptionally affordable, USP-verified product that guarantees label accuracy, which is rare at this price point. However, it fails to reach the gold standard due to the use of soybean oil (a noted red flag carrier oil), the absence of Vitamin K2 for calcium regulation, and plastic packaging instead of amber glass.
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Thorne
Basic Nutrients 2/Day
NSF Certified for Sport. Uses bioavailable forms (methylfolate, methylcobalamin, chelated minerals). No unnecessary additives. Trusted by Mayo Clinic and Olympic teams.
Pure Encapsulations
O.N.E. Multivitamin
Hypoallergenic formula free of all common allergens. Metafolin (5-MTHF) for methylation. Sustained-release CoQ10. One capsule daily simplifies compliance.
Nordic Naturals
Ultimate Omega
IFOS 5-star certified for purity. Triglyceride form for 70% better absorption than ethyl ester. 1280mg EPA+DHA per serving. No fishy burps.
Carlson
Vitamin D3 2000 IU
USP verified for potency and purity. D3 (cholecalciferol) is the form your body makes from sun. Single ingredient with no fillers.