Zinc
Description
Zinc is an essential trace mineral involved in numerous bodily functions, acting as a cofactor for over 300 enzymes. It plays a critical role in immune system function, helping to fight off infections and support the development and function of immune cells. Zinc is also vital for cell growth and division, DNA synthesis, and protein synthesis, making it essential for overall development and tissue repair. Beyond its fundamental roles, zinc contributes significantly to wound healing, often used topically and orally for skin health. It is also crucial for sensory functions, particularly taste and smell, and a deficiency can lead to altered perception of these senses. Furthermore, zinc is important for normal growth and development during pregnancy, childhood, and adolescence, and contributes to reproductive health. Maintaining adequate zinc levels is important for antioxidant defense, as it helps reduce oxidative stress, and for proper thyroid function. Its widespread involvement in metabolic processes underscores its importance for maintaining overall health and well-being.
Sources
OystersRed meat (beef, pork)PoultryBeansNuts (cashews, almonds)Whole grainsDairy products (milk, yogurt)Certain seafood (crab, lobster)Fortified cereals
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Timing & Intake
AnytimeWith food
Can be taken with food to minimize gastrointestinal discomfort like nausea.
Daily Intake
RDA (Men)11 mg
RDA (Women)8 mg
RDI11 mg
Optimal Dosage
Minimum15 mg
Maximum30 mg
Safety & Toxicity
Upper Limit (UL)40 mg
Toxicity Threshold100 mg
Toxicity EffectNausea, vomiting, immune suppression
Goals
Digestive Health
Impact
Highest effect
Typical dose:15–30 mg
Zinc is a key cofactor for enzymes involved in cell repair and regeneration. It plays a direct role in regulating the stability of intestinal tight junctions, and deficiency can lead to increased gut permeability. A well-absorbed form like zinc carnosine is particularly effective.
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Hair Health
Impact
Highest effect
Typical dose:15–30 mg
Zinc is vital for DNA and RNA production, which is required for the normal division of hair follicle cells, leading to healthier hair growth. It also helps balance hormones and keep the oil glands around the follicles working properly. Supplementation can be highly effective for hair loss caused by zinc deficiency.
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Immunity
Impact
Highest effect
Typical dose:15–50 mg
Zinc is a critical cofactor for hundreds of enzymes and is vital for immune cell (T-cells, NK cells) proliferation and communication. Adequate levels are required for a proper immune response, while acute supplementation can inhibit viral replication in the upper respiratory tract.
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Metabolism Boost
Impact
Highest effect
Typical dose:11–30 mg
Zinc is required for the synthesis of Thyroid Releasing Hormone (TRH) and for the proper function of thyroid receptors. It also plays a key role in insulin synthesis, storage, and secretion. A deficiency in zinc can directly impair both thyroid function and insulin sensitivity, making adequate levels foundational for a healthy metabolism.
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Productivity Boost
Impact
Highest effect
Typical dose:15–40 mg
Zinc is highly concentrated in the brain and plays a vital role in synaptic plasticity and communication between neurons. It also acts as an antioxidant. Deficiency can impair learning, memory, and mood, making adequate levels a key component of optimal cognitive function.
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Interactions
Positive Interactions
Vitamin C
Both zinc and Vitamin C are crucial for immune function and are often taken together for synergistic immune support.
Vitamin A
Zinc is necessary for the metabolism and utilization of Vitamin A, including its transport from the liver and conversion to its active form.
Biotin
Zinc is a cofactor for enzymes involved in biotin metabolism.
Folate
Zinc is involved in the absorption and metabolism of folate.
Vitamin B6
Zinc and Vitamin B6 are cofactors for many enzymes and work synergistically in various metabolic pathways.
Vitamin D
Both zinc and Vitamin D are important for immune function and bone health, potentially offering complementary benefits.
Magnesium
Zinc and Magnesium often work together in various enzymatic reactions and cellular processes, supporting overall metabolic health.
Selenium
Both zinc and selenium are important antioxidants and support immune function, often found together in immune support formulations.
Negative Interactions
Iron
High doses of zinc can inhibit the absorption of iron, and vice versa. It's often recommended to take them at different times or in balanced ratios.
Copper
High doses of zinc can interfere with copper absorption, potentially leading to copper deficiency. Zinc supplements sometimes include copper to maintain balance.
Calcium
Very high doses of calcium might slightly interfere with zinc absorption, though this interaction is generally less significant compared to iron or copper.
Product stats
Price per product
Average$21.91
Median$16.11
Price per serving
Average$0.50
Median$0.20
Price per 10 mg
Average$0.14
Median$0.06
Price distribution
Price per serving distribution
Price per 10 mg
Reference amount: 10 mg
Forms
Paired ingredients
Ingredient forms
Zinc Citrate (209) 75
Zinc citrate is a salt of zinc and citric acid. It is known for its good bioavailability and is often chosen for dietary supplements due to its effectiveness and generally good tolerability.
Pros
- Good absorption rate
- Generally well-tolerated
- Cost-effective
Cons
- May cause mild GI upset in sensitive individuals or at high doses
Per product
Avg$30.92
Med$25.99
Per serving
Avg$0.90
Med$0.62
Per 10 mg
Avg$0.38
Med$0.27
Price distribution
Zinc Oxide (136) 30
Zinc oxide is a widely used ingredient in topical preparations like sunscreens and diaper rash creams due to its protective and soothing properties. However, its oral absorption for systemic zinc supplementation is very poor, making it less effective than other forms for internal use.
Pros
- Very inexpensive
- Excellent for topical applications (sunscreen, skin protectant)
- Antiseptic and astringent properties when applied externally
Cons
- Extremely poor oral bioavailability for systemic zinc supplementation
- Less effective for addressing internal zinc deficiencies
Per product
Avg$22.42
Med$19.18
Per serving
Avg$0.44
Med$0.25
Per 10 mg
Avg$0.25
Med$0.13
Price distribution
Zinc Picolinate (101) 85
Zinc picolinate is formed by binding zinc to picolinic acid, a natural chelate produced in the body. Research suggests it offers superior absorption compared to other common forms like zinc gluconate or citrate, making it highly effective for supplementing zinc levels.
Pros
- Excellent bioavailability and absorption
- Well-researched for superior uptake
- Generally well-tolerated
Cons
- Potentially higher cost than less bioavailable forms
Per product
Avg$32.01
Med$24.32
Per serving
Avg$0.63
Med$0.51
Per 10 mg
Avg$0.35
Med$0.26
Price distribution
Zinc Gluconate (96) 70
Zinc gluconate is a zinc salt of gluconic acid. It is one of the most popular forms of zinc used in dietary supplements and cold lozenges due to its good absorption and reasonable cost. It's generally well-tolerated and effective for routine zinc supplementation.
Pros
- Widely available and cost-effective
- Good absorption
- Commonly used in lozenges for immune support
Cons
- Absorption may be slightly lower than highly chelated forms (e.g., picolinate, bisglycinate)
- Can cause mild GI upset in some individuals
Per product
Avg$22.51
Med$19.95
Per serving
Avg$0.68
Med$0.58
Per 10 mg
Avg$0.36
Med$0.30
Price distribution
Zinc Bisglycinate (65) 90
Zinc bisglycinate, also known as zinc glycinate, is a chelated form where zinc is bound to two glycine amino acid molecules. This chelation protects zinc from inhibitors in the gut, leading to superior absorption and significantly reduced gastrointestinal upset compared to other forms. It is considered one of the most effective and well-tolerated zinc supplements.
Pros
- Superior bioavailability and absorption
- Excellent gastrointestinal tolerability (less stomach upset)
- Effective at lower doses
- Suitable for sensitive individuals
Cons
- Generally higher cost than unchelated or less bioavailable forms
Per product
Avg$28.32
Med$26.68
Per serving
Avg$0.58
Med$0.60
Per 10 mg
Avg$0.38
Med$0.40
Price distribution
Zinc Amino Acid Chelate (45) 80
Zinc amino acid chelate refers to zinc bound to amino acids (e.g., glycine, methionine, aspartate). This chelation process protects zinc from dietary inhibitors, improving its absorption and bioavailability compared to inorganic forms like zinc oxide. The specific amino acid(s) used can influence the exact absorption profile and tolerability.
Pros
- Improved absorption and bioavailability over inorganic forms
- Generally well-tolerated with reduced GI upset
- Offers a balance of efficacy and cost-effectiveness
Cons
- Specific bioavailability can vary depending on the amino acid used for chelation
- Less specific than named chelates (e.g., bisglycinate, picolinate)
Per product
Avg$28.45
Med$23.93
Per serving
Avg$0.76
Med$0.49
Per 10 mg
Avg$0.51
Med$0.30
Price distribution
Zinc Bisglycinate Chelate (45) 90
Zinc bisglycinate chelate is a premium form of zinc where zinc is molecularly bonded to two glycine molecules. This stable chelate structure ensures it passes through the digestive tract largely intact, preventing interactions with other dietary components that could inhibit absorption. This leads to superior bioavailability and exceptional gastrointestinal tolerability, making it ideal for those seeking maximum efficacy and minimal stomach upset.
Pros
- Superior bioavailability and absorption due to stable chelate structure
- Excellent gastrointestinal tolerability (minimal stomach upset)
- Effective at lower doses, ideal for sensitive individuals
- Often a preferred choice for high-quality supplementation
Cons
- Generally higher cost than less bioavailable or unchelated forms
Per product
Avg$30.20
Med$27.16
Per serving
Avg$0.71
Med$0.52
Per 10 mg
Avg$0.51
Med$0.38
Price distribution
Zinc Aspartate (32) 75
Zinc aspartate is a form of zinc where the mineral is chelated with aspartic acid, an amino acid. This chelation enhances its absorption compared to inorganic forms, making it a bioavailable option for zinc supplementation. It is often included in mineral complexes.
Pros
- Good absorption and bioavailability
- Generally well-tolerated
- Often combined with other minerals (e.g., ZMA formulations)
Cons
- Less widely researched or common compared to gluconate or picolinate for individual supplementation
- May cause mild GI upset in sensitive individuals or at high doses
Per product
Avg$23.00
Med$23.08
Per serving
Avg$0.64
Med$0.66
Per 10 mg
Avg$0.32
Med$0.19
Price distribution
Zinc Monomethionine (23) 88
Zinc monomethionine is a unique chelated form where zinc is bound to the amino acid L-methionine. This specific chelate is designed for superior absorption and retention in the body compared to other zinc forms. Brands like OptiZinc® are known for utilizing this form, emphasizing its enhanced bioavailability and sustained benefits.
Pros
- Excellent bioavailability and absorption
- Good retention in the body for sustained benefits
- Generally well-tolerated
- Often considered a premium form for efficacy
Cons
- Typically higher cost due to specialized chelation and often proprietary formulations
Per product
Avg$32.38
Med$28.57
Per serving
Avg$1.02
Med$0.73
Per 10 mg
Avg$0.38
Med$0.24
Price distribution