What is Zinc Bisglycinate?
Zinc is an essential mineral that plays a crucial role in numerous bodily functions — including several vital for optimal brain health and cognitive performance.
Zinc Bisglycinate is a form of zinc bound to two molecules of the amino acid glycine. This binding enhances bioavailability, making it easier for the body to absorb and utilise compared to other forms [1].
In the body and brain, zinc serves several crucial functions:
- Acts as a cofactor for over 300 enzymes
- Supports neurotransmitter function and synaptic plasticity
- Plays a role in protein synthesis and DNA repair
- Contributes to immune function and wound healing
- Supports antioxidant processes
- Involved in hormone production and regulation
The science behind Zinc.
Research has revealed several potential benefits of zinc supplementation:
- Cognitive function — A study in the European Journal of Clinical Nutrition found zinc supplementation improved cognitive performance in school children [2].
- Mood regulation — Research in Biological Psychiatry demonstrated zinc supplementation could enhance the effectiveness of antidepressant therapy [3].
- Neuroprotection — A review in Nutrients highlighted zinc's role in protecting against oxidative stress and neuroinflammation [4].
- Synaptic plasticity — A study in Neuron demonstrated zinc's role in modulating synaptic plasticity and cognitive function [5].
- Sleep quality — A study in the Journal of the American Geriatrics Society found zinc supplementation improved sleep quality in older adults [6].
Benefits of Zinc Bisglycinate.
Zinc Bisglycinate offers a wide range of potential benefits:
- Cognitive function — Adequate zinc levels associated with better memory and attention [7].
- Mood regulation — Plays a role in neurotransmitter function, supporting mood balance [8].
- Neuroprotection — Antioxidant properties may protect brain cells from oxidative stress [9].
- Synaptic plasticity — Supports learning and memory processes [10].
- Sleep quality — May improve sleep, indirectly supporting cognitive function [11].
- Immune function — Critical role in immune health [12].
- Hormonal balance — Involved in hormone production and regulation.
Why Zinc Bisglycinate specifically? Superior absorption, gentler on the stomach, and stability [13] — making it the cleanest form for daily use.
Dosage and our approach.
The Recommended Dietary Allowance for zinc is 11 mg per day for adult men and 8 mg for adult women. Higher doses have been used in studies showing cognitive benefits — a study in the European Journal of Clinical Nutrition used 20 mg daily and found improvements in cognitive performance [14].
A daily dose of 15 mg of Zinc Bisglycinate provides a substantial amount above the RDA — offering cognitive benefits while remaining well within safe limits for long-term use.
15 mg — 150% of NRV. Aligned to the "minimum viable dose" for benefit, with long-term use in mind. Focus for decades, not minutes.
Potential side effects.
Zinc Bisglycinate is generally considered safe when taken as directed. Be aware of:
- Gastrointestinal discomfort — Nausea, vomiting, or diarrhoea (especially on an empty stomach) [15].
- Copper deficiency — Long-term high-dose zinc can interfere with copper absorption.
- Headache — Occasionally reported [16].
- Altered taste perception — A metallic taste in rare cases.
- Interactions with medications — May interact with antibiotics and diuretics [17].
Most side effects are rare at moderate dosages. Zinc Bisglycinate is typically well-tolerated.
Synergistic effects with other nutrients.
Zinc works particularly well in combination with other nutrients:
- Zinc + Vitamin B6 — Support neurotransmitter production and function together.
- Zinc + Magnesium — Combination may help improve sleep quality and reduce stress.
- Zinc + Vitamin C — Boost immune function and antioxidant activity together.
Worth noting: zinc may help alleviate symptoms of brain fog, potentially by supporting neurotransmitter function and reducing oxidative stress in the brain [18].
In short.
Zinc Bisglycinate is a highly bioavailable form of zinc that offers benefits for cognitive function, mood regulation, and overall brain health. Its role in neurotransmitter signalling, synaptic plasticity, and neuroprotection makes it valuable for those optimising cognitive performance and long-term brain health.
Effects are typically cumulative — consistent, long-term use combined with a healthy lifestyle is key to experiencing the full benefits.