Overview
Glycine-chelated zinc — high absorption and very gentle on the stomach.
- Whole foods (leafy greens, legumes, nuts, seeds, seafood, animal proteins)
- Fortified foods such as cereals, breads, plant milks, and table salt
- Mineral supplements as chelates, citrates, glycinates, or inorganic salts
- Chelated form (glycinate, bisglycinate, citrate, malate)
- Inorganic salt (oxide, sulfate, chloride)
- Liquid ionic solution
- Topical or transdermal preparation
Forms & variants of Zinc
Different chemical forms of Zinc behave differently. Browse each form's mechanism, bioavailability, and best-use context.
Cofactor for ~300 enzymes — critical for testosterone, immune function, and DNA synthesis.
Zinc chelated to picolinic acid — one of the most bioavailable oral forms.
Lozenge form shown to shorten cold duration when used at first symptoms.
Most common over-the-counter zinc form — affordable, moderate bioavailability.
Chelated zinc with superior absorption and tolerability.
Mechanism of action
Chelated to two glycines, absorbed via amino acid transporters.
- · Zn enzymes
- · Immune signaling
Effects on the body
Organ system effects
Zinc Bisglycinate modulates innate and adaptive immune responses, including cytokine signaling and barrier function.
Zinc Bisglycinate supports collagen synthesis, antioxidant defense, or barrier function in skin and integumentary tissues.
Evidence-based benefits
Equivalent or better absorption vs picolinate, fewer GI complaints
Limited evidencePotential side effects
- · Zinc Bisglycinate is generally well-tolerated at evidence-based doses
- · Mild GI discomfort (nausea, loose stools, or bloating) possible at higher intakes
- · Headache or transient fatigue reported by a small fraction of users
- · Allergic or hypersensitivity reaction (rash, itching, swelling)
- · Sleep disturbance if taken late in the day
- · Discontinue and seek medical advice if symptoms are severe, persistent, or include difficulty breathing
Drug interactions
Safety & non-supplemental interactions
Educational summary — always confirm with your clinician or pharmacist before starting, stopping, or combining with prescription therapy.
- ·Autoimmune disease (theoretical immune activation)
- ·Immunosuppressants
Supplement interactions
- Vitamin D3 + K2Foundational immune modulation.
- ZincRequired cofactor for innate and adaptive immune function.
- Collagen peptidesProvides amino acid substrate for connective tissue synthesis.
No specific avoidances listed.
Dosing & bioavailability
Where to buy
Affiliate links — we may earn a commission at no extra cost to you. Amazon code supplementsch-20 is auto-applied at checkout. We don't endorse specific brands; verify third-party testing (USP, NSF, Informed Sport) before purchase.
Third-party testedIndependently verified Zinc Bisglycinate — look for USP, NSF, or Informed Sport seals on the label for purity and dose accuracy.Zinc Bisglycinate third party tested NSF
CapsulesPre-measured Zinc Bisglycinate capsules — easiest for travel and consistent daily dosing without scoops or scales.Zinc Bisglycinate capsules
PowderBulk unflavored Zinc Bisglycinate powder — best cost-per-gram and flexible dosing for stacking or mixing into drinks.Zinc Bisglycinate powder unflavored
Best sellersMost-purchased Zinc Bisglycinate products on Amazon — a quick way to see what's reviewed widely before you commit.Zinc Bisglycinate best sellerScientific evidence8Show studiesHide studies
Zinc bisglycinate vs gluconate absorption
Gandia P, et al.
Crossover trial in healthy subjects.
Bisglycinate produced higher serum zinc AUC than gluconate.
PubMed: Zinc Bisglycinate — Equivalent or better absorption vs picolinate, fewer GI complaints
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PubMed: Zinc Bisglycinate — dose response
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Google Scholar: Zinc Bisglycinate — clinical evidence
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