Module 23
Which cognitive supplements are appropriate at each developmental stage, with doses and safety notes
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Supports immune function, bone growth, mood, and brain development via vitamin D receptors throughout the brain.
600–1,000 IU/day
Liquid or chewable
Test levels before high-dose supplementation. Toxicity possible above 4,000 IU/day without monitoring.
Essential structural component of brain cell membranes. Supports attention, language development, and processing speed.
150–250 mg DHA/day
Flavored liquid or gummies
Use third-party tested products (IFOS certified). May cause fishy aftertaste. Allergy risk for children with fish allergy.
Supports GABA function, sleep quality, calm behavior, and stress resilience. Over 300 enzymatic reactions depend on Mg.
80–130 mg/day
Glycinate powder in food
Glycinate or threonate forms preferred over oxide (better absorbed). High doses may cause loose stools.
Supports the gut-brain axis, immune development, and microbiome diversity. Directly influences brain via vagus nerve.
L. reuteri strain-specific
Liquid drops
Use strains with pediatric research data (L. rhamnosus, B. longum). Probiotics may contain dairy allergens.
Essential for oxygen transport, myelination, and neurotransmitter synthesis. Deficiency directly impairs cognitive development.
Per pediatrician
Liquid
ONLY supplement if deficient. Excess iron is harmful. Screen at 9–12 months. Test, don't guess.
Supports immune function, neurotransmitter production, and dopamine signaling for attention.
5–8 mg/day
Liquid or chewable
Don't exceed UL (12 mg/day ages 4–8, 23 mg/day ages 9–13). Balance with copper at ~15:1 ratio for long-term use.
Hormone that regulates the sleep-wake cycle. Can help with sleep onset in children with circadian disruption.
0.5–1 mg (30 min before bed)
Liquid or gummy
Use lowest effective dose. Not for long-term nightly use without doctor supervision. Address sleep hygiene first. Unregulated — purity varies widely.