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Deficiency Protocol

Daily Essentials

A baseline protocol for people with inconsistent diets, low sun exposure, or low intake of fish and animal foods. It should be personalized with labs rather than used as a permanent megadose stack.

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Daily Essentials
Protocol Warnings

Iron-containing multivitamins are not appropriate for many men or postmenopausal women unless deficiency is confirmed

Kidney disease — review magnesium/vitamin D

Pregnancy — use prenatal-specific guidance

Editorial review

Evidence sources and internal references reviewed. This protocol has not received independent clinical review.

Reviewed by:
HowToSupplement Editorial Team
Reviewed:
5/19/2026

Protocol sources

Under the Hood

Targets common nutrient gaps rather than performance enhancement.

Improves coverage of common micronutrient gaps
Supports vitamin D status
Supports magnesium intake
Adds B12 when plant-based intake makes sense

Expected Results

Most blood-marker changes should be checked after 8-12 weeks if deficiency is suspected.

Better nutrient consistency
Correction of low vitamin D or B12 if present
Fewer diet-related weak spots
Little effect if the diet is already nutrient-dense

Supplement Routine

Core

Multivitamin

Dosage
1 serving
Timing
With the largest meal; choose a product near RDA levels, not megadosed.
Core

Vitamin D

Dosage
1000-2000 IU
Timing
With a fat-containing meal; adjust by blood test and season.
Core

Magnesium

Dosage
200-350 mg elemental magnesium
Timing
Evening or with meals depending on tolerance.
Optional

Omega-3

Dosage
1 g EPA+DHA
Timing
With food if fatty fish intake is below 1-2 servings/week.
Optional

Vitamin B12

Dosage
250-500 mcg
Timing
Daily if vegan/vegetarian or low status; otherwise use only if intake is low.

Biological Synergies

Vitamin D + Magnesium

Magnesium is required for vitamin D metabolism and many people with low-quality diets are low in both.

More complete correction of common nutrient gaps.

Multivitamin + Vitamin B12

A multivitamin covers broad gaps, while dedicated B12 is often needed when animal-food intake is low.

Better coverage for vegan or vegetarian users than a standard multivitamin alone.