1. Clinical & Scientific Overview
Zinc Picolinate / Zinc Gluconate (TIP-MED-000631, Reference Code [SUP-07]) is classified under
Dietary Supplements & Nutraceuticals (FSSAI / ICMR-NIN) as a Clinical Nutrition & Nutraceutical Science • Essential Trace Element for Metalloenzymes, Immunity & Epithelial Repair.
Within the Indian regulatory and compendial framework, it is governed under FSSAI Health Supplement & Nutraceutical Regulation, 2022..
FSSAI Licensed Health Supplement / Nutraceutical Formulations (RDA Compliant)
ICMR-NIN 2024 RDA: 17 mg/day (adult men), 13.2 mg/day (adult women), 14.5 mg/day (pregnancy), 14.1 mg/day (lactation); Tolerable Upper Limit (UL): 40 mg/day elemental zinc. (Note: WHO/IAP 20 mg/day elemental zinc for 14 days with ORS in acute paediatric diarrhoea is a therapeutic drug protocol).
Clinical Nutrition, ICMR-NIN RDA & FSSAI Nutraceutical Profile
Zinc Gluconate / Zinc Picolinate
Essential Trace Element for Metalloenzymes, Immunity & Epithelial Repair
Pumpkin/sesame seeds, chickpeas, lentils, dairy, eggs, and shellfish (phytates in unsoaked cereals chelate zinc in the gut)
ICMR-NIN 2024 Recommended Dietary Allowance (RDA) & Tolerable Upper Intake Limit (UL): ICMR-NIN 2024 RDA: 17 mg/day (adult men), 13.2 mg/day (adult women), 14.5 mg/day (pregnancy), 14.1 mg/day (lactation); Tolerable Upper Limit (UL): 40 mg/day elemental zinc. (Note: WHO/IAP 20 mg/day elemental zinc for 14 days with ORS in acute paediatric diarrhoea is a therapeutic drug protocol).
Deficiency Clinical Syndromes vs Chronic Excess / Hypervitaminosis Risks: Deficiency: Acrodermatitis enteropathica, impaired wound healing, alopecia, hypogeusia (loss of taste), growth retardation, and recurrent infections. CRITICAL CHRONIC EXCESS TOXICITY (>40–50 mg/day for >4–6 weeks): High oral zinc strongly induces intestinal enterocyte Metallothionein, which binds dietary Copper with higher affinity than zinc and sloughs it off into the faeces -> severe Copper Deficiency, sideroblastic microcytic/normocytic anaemia, neutropenia, and irreversible myeloneuropathy!
Drug–Nutrient Chelation & Timing Interactions: Chelates fluoroquinolones, tetracyclines, and penicillamine (separate by 2 hours); take with food to prevent acute gastric irritation/nausea; never exceed 40 mg/day elemental zinc chronically without copper monitoring.
FSSAI Health Supplement vs Therapeutic Drug Distinction: FSSAI Health Supplement & Nutraceutical Regulation, 2022.
3. Mechanism of Action & Pharmacodynamics
Catalytic and structural cofactor for >300 zinc-finger transcription factors and metalloenzymes (carbonic anhydrase, superoxide dismutase Cu/Zn-SOD, alkaline phosphatase, DNA/RNA polymerase, and thymulin T-cell maturation hormone).
4. Therapeutic Indications & Evidence-Supported Uses
- Physiological & Biochemical Role: Catalytic and structural cofactor for >300 zinc-finger transcription factors and metalloenzymes (carbonic anhydrase, superoxide dismutase Cu/Zn-SOD, alkaline phosphatase, DNA/RNA polymerase, and thymulin T-cell maturation hormone).
- Dietary Sources: Pumpkin/sesame seeds, chickpeas, lentils, dairy, eggs, and shellfish (phytates in unsoaked cereals chelate zinc in the gut)
- ICMR-NIN RDA & Upper Limits: ICMR-NIN 2024 RDA: 17 mg/day (adult men), 13.2 mg/day (adult women), 14.5 mg/day (pregnancy), 14.1 mg/day (lactation); Tolerable Upper Limit (UL): 40 mg/day elemental zinc. (Note: WHO/IAP 20 mg/day elemental zinc for 14 days with ORS in acute paediatric diarrhoea is a therapeutic drug protocol).
5. Educational Dosage Context, Formulations & Administration
Educational Dosing & Regimen Summary: ICMR-NIN 2024 RDA: 17 mg/day (adult men), 13.2 mg/day (adult women), 14.5 mg/day (pregnancy), 14.1 mg/day (lactation); Tolerable Upper Limit (UL): 40 mg/day elemental zinc. (Note: WHO/IAP 20 mg/day elemental zinc for 14 days with ORS in acute paediatric diarrhoea is a therapeutic drug protocol).
Administration & Meal Timing: Chelates fluoroquinolones, tetracyclines, and penicillamine (separate by 2 hours); take with food to prevent acute gastric irritation/nausea; never exceed 40 mg/day elemental zinc chronically without copper monitoring.
6. Pharmacokinetics, Metabolism & Renal/Hepatic Adjustment
Salt-form and meal-timing dependent gastrointestinal absorption; see bioavailability and drug-nutrient chelation notes (Chelates fluoroquinolones, tetracyclines, and penicillamine (separate by 2 hours); take with food to prevent acute gastric irritation/nausea; never exceed 40 mg/day elemental zinc chronically without copper monitoring.).
Incorporated into cellular coenzyme pools, metalloproteins, or membrane phospholipids.
Caution with magnesium, potassium, calcium, vitamin D, and high-dose vitamin C/collagen (oxalate) in Chronic Kidney Disease.
Caution with fat-soluble vitamins and concentrated lipophilic extracts in hepatobiliary disease.
7. Contraindications, Precautions & High-Risk Warnings
- Supratherapeutic megadosing above the ICMR-NIN Tolerable Upper Intake Level (UL) without medical indication
- Deficiency: Acrodermatitis enteropathica, impaired wound healing, alopecia, hypogeusia (loss of taste), growth retardation, and recurrent infections. CRITICAL CHRONIC EXCESS TOXICITY (>40–50 mg/day for >4–6 weeks): High oral zinc strongly induces intestinal enterocyte Metallothionein, which binds dietary Copper with higher affinity than zinc and sloughs it off into the faeces -> severe Copper Deficiency, sideroblastic microcytic/normocytic anaemia, neutropenia, and irreversible myeloneuropathy!
Key Clinical Precautions: Deficiency: Acrodermatitis enteropathica, impaired wound healing, alopecia, hypogeusia (loss of taste), growth retardation, and recurrent infections. CRITICAL CHRONIC EXCESS TOXICITY (>40–50 mg/day for >4–6 weeks): High oral zinc strongly induces intestinal enterocyte Metallothionein, which binds dietary Copper with higher affinity than zinc and sloughs it off into the faeces -> severe Copper Deficiency, sideroblastic microcytic/normocytic anaemia, neutropenia, and irreversible myeloneuropathy!
8. Adverse Effects Profile
- Deficiency: Acrodermatitis enteropathica, impaired wound healing, alopecia, hypogeusia (loss of taste), growth retardation, and recurrent infections. CRITICAL CHRONIC EXCESS TOXICITY (>40–50 mg/day for >4–6 weeks): High oral zinc strongly induces intestinal enterocyte Metallothionein, which binds dietary Copper with higher affinity than zinc and sloughs it off into the faeces -> severe Copper Deficiency, sideroblastic microcytic/normocytic anaemia, neutropenia, and irreversible myeloneuropathy!
- Deficiency: Acrodermatitis enteropathica, impaired wound healing, alopecia, hypogeusia (loss of taste), growth retardation, and recurrent infections. CRITICAL CHRONIC EXCESS TOXICITY (>40–50 mg/day for >4–6 weeks): High oral zinc strongly induces intestinal enterocyte Metallothionein, which binds dietary Copper with higher affinity than zinc and sloughs it off into the faeces -> severe Copper Deficiency, sideroblastic microcytic/normocytic anaemia, neutropenia, and irreversible myeloneuropathy!
9. Major Drug–Drug, Drug–Food & Drug–Herb Interactions
- Chelates fluoroquinolones, tetracyclines, and penicillamine (separate by 2 hours); take with food to prevent acute gastric irritation/nausea; never exceed 40 mg/day elemental zinc chronically without copper monitoring.
10. Clinical Monitoring, Patient Counselling & Storage
Clinical & Laboratory Monitoring: Verify whether the patient requires physiological nutritional maintenance (<=1 RDA under FSSAI) or high-dose therapeutic deficiency correction (Schedule H/medical supervision), and check for multi-supplement stacking.
Pharmacist Patient Counselling Points:
- Chelates fluoroquinolones, tetracyclines, and penicillamine (separate by 2 hours); take with food to prevent acute gastric irritation/nausea; never exceed 40 mg/day elemental zinc chronically without copper monitoring.
- Check all multivitamin and wellness labels to avoid accidentally doubling up on fat-soluble vitamins (A, D, E, K), iron, or zinc.
- Health supplements support normal physiological nutrition and are NOT intended to diagnose, treat, cure, or prevent disease under Section 22 of the FSS Act, 2006.
Storage, Stability & Dispensing Safeguards: Store in a cool, dry place below 25°C away from moisture and direct sunlight; verify FSSAI License Number and Veg/Non-Veg symbol on packaging.
11. Visual Pharmacology & Mechanism Diagram (svg-v339-01-adme-12-step-journey)
12. Authoritative References, Regulatory Sources & Editorial Disclaimer
Primary Compendial & Guideline Reference: ICMR-NIN (National Institute of Nutrition) Nutrient Requirements and Recommended Dietary Allowances (RDA) for Indians (2020/2024); FSSAI (Health Supplements, Nutraceuticals, Food for Special Dietary Use, Food for Special Medical Purpose, Functional Food and Novel Food) Regulations, 2022.
Official Verification Portals: ICMR-National Institute of Nutrition (NIN) — Dietary Guidelines & Nutrient Requirements for Indians • FSSAI — Food Safety and Standards (Health Supplements and Nutraceuticals) Regulations
Last Medically & Pharmaceutically Reviewed: 2026-11-10 • Verification Status: VERIFIED_EDUCATIONAL_CONTENT
Educational & Clinical Disclaimer: This reference profile is published solely for pharmacy education, academic study, and professional clinical reference. It does not substitute for patient-specific clinical judgement, qualified specialist oncology/medical supervision, or official CDSCO/IP prescribing information. Never self-medicate with prescription, Schedule H/H1/X, NDPS, or oncology medicines.