Deficiency/Immunity

Multivitamin Complex

A broad-spectrum supplement combining essential vitamins and minerals intended to fill nutritional gaps, though evidence for health benefits in well-nourished populations remains limited.

Multivitamin Complex

Multivitamin Complex

45
score
C
evidence
Safe
risk

Proven Benefits

01Fills nutritional gaps in deficient diets
02May slow cognitive aging in older adults
03Supports general immune function
04Reduces oxidative stress biomarkers
05May reduce psychological stress symptoms
06Prenatal support for fetal development

Chemical Forms

Recommended
  • Methylated B vitamins (methylfolate, methylcobalamin)
  • Chelated minerals (glycinate, citrate forms)
  • Vitamin D3 (cholecalciferol, not D2)
  • Vitamin K2 (MK-7 form)
Avoid
  • Folic acid (synthetic; use methylfolate instead)
  • Cyanocobalamin (use methylcobalamin instead)
  • Mineral oxides (zinc oxide, magnesium oxide — poor absorption)
  • Mega-dose formulas exceeding UL values
Expert Note

Bioactive/methylated forms improve absorption

Protocol

Amount
1 - 2 capsules/tablets
Frequency
daily
When
With food (improves fat-soluble vitamin absorption)

Condition-Based Dosing

General nutritional insurance
1 serving of a quality MVM at 100% RDA levels
Cognitive health in older adults (60+)
Daily MVM (broad-spectrum, Centrum Silver-type)
Prenatal support
Prenatal MVM with folate, iron, DHA, iodine
Vegetarian/vegan diets
MVM including B12, iron, zinc, iodine, vitamin D
Post-bariatric surgery
Specialized bariatric MVM with higher doses

Safety & Limits

Upper Safe Limit
Do not exceed 100% DV for fat-soluble vitamins (A, D, E, K)
Cycling
Safe for continuous use

Contraindications

Iron-containing MVMs in hemochromatosis (iron overload)
Vitamin K in MVMs with warfarin/anticoagulant use
High-dose vitamin A in pregnancy (teratogenic risk)
Levothyroxine users (iron/calcium in MVMs reduce absorption; separate by 4 hrs)
Antibiotic use (minerals chelate tetracyclines and fluoroquinolones)
Kidney disease (risk of mineral accumulation)
Phenylketonuria if MVM contains phenylalanine
Bipolar disorder with methylated B vitamins (may trigger mania)

Synergies

Omega-3

Covers essential fatty acids not found in most MVMs

Vitamin D3

Most MVMs contain insufficient vitamin D; may need separate supplement

Magnesium

MVMs rarely contain adequate magnesium due to bulk; supplement separately

Avoid Combining With

  • ✕Coffee/tea within 1 hour (tannins reduce iron and mineral absorption)
  • ✕Calcium and iron in same dose (compete for absorption)
  • ✕High-fiber meals (phytates can bind minerals)
  • ✕Dairy with iron-containing MVMs (calcium impairs iron uptake)
Updated 4/15/2026