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zinc bisglycinate chelate

Also known as: Zinc bisglycinate, zinc glycinate chelate, zinc amino acid chelate, Zinc glycinate, Zinc diglycinate, Zinc bisglycinate chelate

Overview

Zinc bisglycinate chelate is a highly bioavailable form of zinc, an essential trace mineral, where zinc is bound to two molecules of the amino acid glycine. This chelated structure enhances its absorption in the digestive system compared to inorganic zinc salts. Naturally, zinc is found in various foods such as meat, shellfish, legumes, seeds, and nuts. This supplement is primarily used to prevent or treat zinc deficiency, a common issue that can impair numerous bodily functions. It is also widely utilized to bolster immune system function, improve metabolic health, and support cognitive processes. While general zinc supplementation has extensive research backing its benefits, direct randomized controlled trials specifically on zinc bisglycinate chelate are still emerging, though the existing evidence is promising due to its superior absorption profile.

Benefits

Zinc bisglycinate chelate, as a highly absorbable form of zinc, offers several evidence-based benefits. It significantly supports immune function, with studies showing that zinc supplementation can reduce the duration and severity of acute respiratory infections. For instance, a randomized controlled trial indicated a 14% reduction in acute respiratory infection days (Adjusted RR 0.83, 95% CI: 0.76–0.92). In individuals with type 2 diabetes, zinc supplementation has been shown to improve lipid profiles, including significant reductions in total cholesterol, LDL, and triglycerides, alongside an increase in beneficial HDL cholesterol. Modest improvements in cognitive function have also been observed, particularly in overweight or obese women after 12 weeks of supplementation. These benefits are clinically significant for at-risk populations, such as children prone to respiratory infections and individuals with type 2 diabetes. While the direct evidence for bisglycinate chelate is still developing, its enhanced bioavailability suggests it can deliver these benefits effectively.

How it works

Zinc bisglycinate chelate functions by providing highly absorbable elemental zinc to the body, which is crucial for numerous physiological processes. Zinc acts as a vital cofactor for over 300 enzymes involved in various metabolic pathways. In immune function, zinc is essential for the development and activity of immune cells, influencing both innate and adaptive immunity. For metabolic regulation, zinc plays a role in insulin signaling and lipid metabolism, contributing to improved glucose and lipid profiles. Its neuroprotective effects stem from its involvement in neurotransmitter synthesis and function, as well as its influence on neurotrophic factors like BDNF. The chelated form, where zinc is bound to glycine, facilitates its passage through the intestinal wall, enhancing absorption primarily in the small intestine and ensuring efficient delivery to target tissues and systems.

Side effects

Zinc bisglycinate chelate is generally considered safe when taken within recommended dosages. However, higher doses can lead to common gastrointestinal side effects such as nausea, stomach pain, and diarrhea, affecting more than 5% of users. Less common side effects (1-5%) include a metallic taste in the mouth and headaches. Rare but serious side effects (less than 1%) can include allergic reactions and, with long-term high-dose use, copper deficiency, as zinc can interfere with copper absorption. Zinc supplements can interact with certain medications; they may reduce the absorption of antibiotics like quinolones and tetracyclines if taken concurrently, necessitating a 2-4 hour separation between doses. Contraindications include severe renal impairment and known hypersensitivity to zinc. Special populations such as pregnant or lactating women, children, and the elderly should use zinc supplements under medical supervision. Preterm infants, however, may specifically benefit from zinc supplementation for optimal health.

Dosage

For preventing zinc deficiency, a minimum effective dose of 5–10 mg of elemental zinc per day is typically recommended. For therapeutic effects, such as immune support or metabolic improvements, optimal dosage ranges from 15–30 mg of elemental zinc per day. The maximum safe upper limit (UL) for adults is 40 mg of elemental zinc per day. It is advisable to take zinc bisglycinate chelate with food to minimize potential gastrointestinal upset. Chelated forms like bisglycinate are preferred due to their superior absorption and better tolerability compared to inorganic zinc salts. Absorption can be inhibited by phytates found in grains and legumes, while animal protein can enhance it. Long-term zinc supplementation, especially at higher doses, may deplete copper levels, so monitoring copper status or supplementing with copper may be necessary.

FAQs

How should I take zinc bisglycinate chelate with other medications?

To avoid interactions, especially with antibiotics like quinolones and tetracyclines, space your zinc dose by 2-4 hours from these medications. Always consult your doctor for personalized advice.

Is long-term use of zinc bisglycinate chelate safe?

Long-term use at high doses (over 40 mg/day) can potentially lead to copper deficiency. It's important to monitor your copper levels or discuss appropriate co-supplementation with your healthcare provider.

When is the best time to take zinc bisglycinate chelate?

It is best taken with meals to minimize the risk of gastrointestinal side effects such as nausea or stomach upset, which can occur if taken on an empty stomach.

What benefits can I expect from taking this supplement?

You can expect improved immune function, better lipid profiles if you have type 2 diabetes, and potentially modest cognitive benefits. Results vary based on individual needs and health status.

Is more zinc always better for my health?

No, more is not always better. Excessive zinc intake can lead to toxicity and imbalances with other essential minerals like copper. Adhere to recommended dosages for safety and efficacy.

Research Sources

https://pdfs.semanticscholar.org/8021/21dfeb8a279dac2f228bf94ddf5836911698.pdf – This randomized controlled trial investigated the effect of zinc supplementation on acute respiratory infections in infants. It found that zinc supplementation significantly reduced the duration and severity of these infections, demonstrating a 14% reduction in acute respiratory infection days. The study highlights zinc's role in immune support, though it used general zinc supplementation rather than specifically zinc bisglycinate chelate.
https://pubmed.ncbi.nlm.nih.gov/37604307/ – This systematic review and meta-analysis of 14 RCTs examined the impact of zinc supplementation on lipid profiles in patients with type 2 diabetes. It concluded that zinc significantly improved total cholesterol, LDL, and triglyceride levels while increasing HDL, indicating a beneficial effect on metabolic health. The findings are robust, though they generalize across various zinc forms.
https://pmc.ncbi.nlm.nih.gov/articles/PMC10609714/ – This randomized controlled trial explored the effects of zinc supplementation on cognitive scores in overweight or obese women over 12 weeks. The study reported partial improvements in cognitive function, independent of weight loss. While promising, the study had a small sample size and did not specifically use zinc bisglycinate chelate.
https://pubmed.ncbi.nlm.nih.gov/36276891/ – This systematic review investigated the effects of zinc supplementation on brain-derived neurotrophic factor (BDNF) levels. The review found inconsistent effects, suggesting that while zinc influences neuroprotection, its direct impact on BDNF may vary or require further research. This source provides context for zinc's potential neurotrophic effects.
https://pmc.ncbi.nlm.nih.gov/articles/PMC11705620/ – This article discusses the importance of zinc supplementation for preterm infants. It highlights that preterm infants may require zinc supplementation for optimal health and development, underscoring zinc's critical role in vulnerable populations. The source emphasizes the necessity of medical supervision for such specific cases.