Nootropic profile
Zinc
Zinc is an essential trace mineral critical for neurotransmitter function, synaptic plasticity, and cognitive development. It acts as a neuromodulator in the brain, supporting memory, mood regulation, and immune defence.
Best for
Educational only: this is not medical advice. Always check with a qualified healthcare professional before starting any supplement.
What is Zinc?
Zinc is the second most abundant trace metal in the human body and plays an indispensable role in brain function. It is involved in over 300 enzymatic reactions and is essential for DNA synthesis, cell division, immune function, and protein synthesis.
What it does for you
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How to take it
- RDA: 11 mg/day for adult men, 8 mg/day for adult women.
- Supplemental dose: 15-30 mg per day of elemental zinc for cognitive and mood support.
- Forms: Zinc picolinate and zinc glycinate offer superior absorption. Zinc citrate is another well-absorbed option. Avoid zinc oxide, which has poor...
- Timing: Take with food to prevent stomach upset. Avoid taking with calcium, iron, or high-phytate meals, as these compete for absorption.
- Upper limit: 40 mg per day of elemental zinc from all sources (food + supplements). Chronic use above this can cause copper deficiency.
Watch out for
- Side effects: Nausea, vomiting, and stomach cramps when taken on an empty stomach. Long-term high-dose use (over 40 mg/day) can cause copper deficiency,...
- Drug interactions: May reduce absorption of certain antibiotics (tetracyclines, quinolones). May interact with penicillamine (used for Wilson's disease and...
- Copper balance: Long-term zinc supplementation above 25 mg/day should be paired with a small amount of copper (1-2 mg) to prevent copper deficiency.
- Pregnancy/breastfeeding: Safe at RDA levels (11-12 mg/day). Higher doses should be discussed with a healthcare provider.
The science, if you're curious.
- Zinc is stored in synaptic vesicles and released during neuronal activity, acting as a neuromodulator at glutamatergic and GABAergic synapses. It modulates...
- Increases brain-derived neurotrophic factor (BDNF), which promotes neuroplasticity, neuronal survival, and the growth of new synaptic connections.
- Increases serotonin uptake in select brain regions, enhancing the efficacy of serotonergic signalling and contributing to antidepressant effects.
- Acts as a cofactor for superoxide dismutase (SOD) and other antioxidant enzymes, protecting neurons from oxidative stress and free radical damage.
Where to find it
- Natural food sources: Oysters (the richest source by far), beef, crab, lobster, pork, chicken, pumpkin seeds, cashews, chickpeas, lentils, yogurt, cheese, and fortified cereals.
- Supplement forms: Zinc picolinate, zinc glycinate (chelated, well-absorbed), zinc citrate, zinc gluconate, and zinc acetate. Avoid zinc oxide for supplementation due to poor absorption.
The research
Zinc deficiency and child development
Bhatnagar S, Taneja S - Current Opinion in Clinical Nutrition and Metabolic Care
Zinc supplementation in deficient populations significantly improved attention, reasoning, and cognitive development in children.
Effects of repletion with zinc and other micronutrients on neuropsychologic performance and growth of Chinese children
Sandstead HH, Penland JG, Alcock NW, Dayal HH, Chen XC, Li JS, Zhao F, Yang JJ - American Journal of Clinical Nutrition
Zinc supplementation significantly improved attention, memory, and cognitive performance in children with marginal zinc status.
Frequently asked
Zinc is an essential trace mineral critical for neurotransmitter function, synaptic plasticity, and cognitive development. It acts as a neuromodulator in the brain, supporting memory, mood regulation, and immune defence.
The main benefits people report from Zinc are: Cognitive Enhancement, Energy, Focus, Libido, Longevity, Memory, Mood, Stress Relief.
RDA: 11 mg/day for adult men, 8 mg/day for adult women.Supplemental dose: 15-30 mg per day of elemental zinc for cognitive and mood support.Forms: Zinc picolinate and zinc glycinate offer superior absorption. Zinc citrate is another well-absorbed option. Avoid zinc oxide, which has poor...Timing: Ta...
Side effects: Nausea, vomiting, and stomach cramps when taken on an empty stomach. Long-term high-dose use (over 40 mg/day) can cause copper deficiency,...Drug interactions: May reduce absorption of certain antibiotics (tetracyclines, quinolones). May interact with penicillamine (used for Wilson...
Zinc is stored in synaptic vesicles and released during neuronal activity, acting as a neuromodulator at glutamatergic and GABAergic synapses. It modulates...Increases brain-derived neurotrophic factor (BDNF), which promotes neuroplasticity, neuronal survival, and the growth of new synaptic connecti...
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