Blackmores Bio Zinc A Chelate — zinc in amino acid chelate form for superior absorption versus standard zinc salts, combined with Vitamin A. Formulated to support immune function, skin, nails, and hair. From Blackmores Australia, established 1932. 90 tablets per bottle.
💊 Key ingredients: Zinc (Amino Acid Chelate) + Vitamin A ⏱️ Dosage: 1 tablet daily, or as directed by a doctor or pharmacist 🍽️ Timing: Take with food to reduce the chance of nausea 📦 Pack: 90 tablets per bottle (3-month supply) ⚡ Highlight: Chelated zinc for better bioavailability than sulfate or oxide forms + Vitamin A included in one formula 🌡️ Storage: Store in a cool, dry place below 30°C, away from direct sunlight
Blackmores Bio Zinc A Chelate is a zinc supplement from Blackmores Australia, established 1932. Its key distinction is delivering zinc as an Amino Acid Chelate — a form that is more bioavailable than commonly used Zinc Sulfate or Zinc Oxide. The chelation process bonds zinc ions to amino acids, allowing the mineral to cross the intestinal wall more efficiently while reducing gastric irritation. The formula also includes Vitamin A, which works in conjunction with zinc in several physiological processes.
📊 Key data from leading health organizations
The NIH Office of Dietary Supplements notes that zinc is required for the activity of over 300 enzymes, and is essential for cell division, protein synthesis, and immune system function.
Healthline reports that zinc supports T-cell and Natural Killer Cell activity within the immune system, and plays a role in wound healing and skin health maintenance.
MedlinePlus (NLM) sets the Recommended Dietary Allowance (RDA) for zinc at 11 mg/day for men and 8 mg/day for women, with an Upper Limit (UL) of 40 mg/day. Exceeding the UL long-term may impair copper absorption.
Research published in Nutrients (Wessels et al., 2017) describes zinc as a “gatekeeper” of immune function, regulating the development and activity of both innate and adaptive immune cells.
⚠️ This is a dietary supplement, not a medicine. It is not intended to treat, diagnose, or prevent any specific disease. Pregnant women should always consult a doctor before taking Vitamin A.
Medically reviewed by
ทีมเนื้อหา Intimo Life | Sources: NIH ODS, Healthline, MedlinePlus, Nutrients (Wessels et al.)
Last reviewed: 2026-06-25
About Blackmores Bio Zinc A Chelate
What is Blackmores Bio Zinc? How does Zinc Chelate work?
Blackmores Bio Zinc A Chelate is a zinc supplement from Blackmores Australia — a brand with over 90 years of history in health supplementation. The product's key distinction is its Zinc Amino Acid Chelate form, which differs fundamentally from inorganic zinc salts such as Zinc Sulfate or Zinc Oxide.
How chelation works: Chelation forms a coordination bond between zinc ions (Zn²⁺) and amino acid molecules such as Glycine or Methionine, creating a chelated complex. Advantages include: (1) reduced competition with other minerals (Iron, Calcium) for intestinal absorption; (2) uptake via amino acid transport channels, which operate more efficiently than inorganic ion channels; (3) reduced gastric mucosal irritation compared with Zinc Sulfate.
Zinc serves as a cofactor for more than 300 enzymes in the body, spanning metabolic processes, cell division, DNA and protein synthesis, and immune system function. Blackmores Bio Zinc includes Vitamin A in the same formula to support the complementary physiological roles of both nutrients.
What is zinc used for? Benefits and physiological roles
Zinc in Blackmores Bio Zinc A Chelate may help support several body functions, according to NIH, Healthline, and MedlinePlus data:
Immune system: Zinc plays a role in the development and function of immune cells including T-lymphocytes, Natural Killer Cells, and Neutrophils. Even mild zinc deficiency may impair immune response efficiency (Wessels et al., 2017).
Skin and wound healing: Zinc helps support wound healing and skin health through its role in collagen synthesis and skin cell division. Studies have found that serum zinc levels are often below normal in individuals with acne.
Hair and nails: Zinc is required for the synthesis of Keratin, the primary protein in hair and nails. Zinc deficiency may contribute to hair loss and brittle nails.
Taste and smell: Zinc is essential for normal taste receptor and olfactory receptor function.
Eye health: Zinc is highly concentrated in the retina and plays a role in the function of Vitamin A in the visual cycle.
⚠️ Blackmores Bio Zinc A Chelate is a dietary supplement, not a medicine. The benefits listed reflect nutritional support for normal body function, not treatment of any specific disease.
Zinc Chelate vs Gluconate vs Picolinate vs Sulfate — which form is best?
Zinc supplements come in several forms, each with different absorption rates and trade-offs:
Zinc Amino Acid Chelate (in Blackmores Bio Zinc): Zinc bound to amino acids, absorbed via amino acid transporters. Good bioavailability, low gastric irritation. Best for those with sensitive stomachs or who want maximum absorption efficiency.
Zinc Gluconate: Zinc bound to gluconic acid. Reasonably well absorbed. Commonly used in zinc lozenges for cold relief. Less expensive than chelate forms.
Zinc Picolinate: Zinc bound to picolinic acid (a tryptophan derivative). Some research suggests slightly better absorption than gluconate and citrate, though data is less extensive than for chelate.
Zinc Sulfate: The least expensive inorganic form. Lowest bioavailability of these options and most likely to cause gastric irritation. Must always be taken with food.
Zinc Oxide: High elemental zinc content used in many products, but very low bioavailability when ingested. Better suited for topical applications than oral supplementation.
Summary: Choose Zinc Chelate such as Blackmores Bio Zinc when high bioavailability and low gastric irritation are priorities. Browse all zinc products at Intimo Life Zinc Collection
Why Vitamin A is paired with Zinc in Blackmores Bio Zinc
One of Blackmores Bio Zinc A Chelate's key formula decisions is combining Vitamin A with zinc. There is clear biochemical rationale for this pairing:
The zinc-Vitamin A relationship:
Vitamin A transport: Zinc is required for the synthesis of Retinol-Binding Protein (RBP), the protein that transports Vitamin A from the liver to tissues throughout the body. Zinc deficiency therefore impairs Vitamin A distribution even when the body has adequate stores.
Vision: Both zinc and Vitamin A are required in the visual cycle. Zinc assists in converting Retinol (Vitamin A1) to Retinal — a critical step in producing Rhodopsin for low-light vision.
Skin and epithelium: Vitamin A (Retinol) regulates skin and mucosal cell differentiation and proliferation, complementing zinc's role in protein synthesis and wound healing.
Immunity: Vitamin A helps maintain the integrity of respiratory and gastrointestinal mucosa — the body's first-line immune barrier — working synergistically with zinc's support of immune cells.
⚠️ Important Vitamin A caution: The NIH sets the Upper Limit (UL) for Vitamin A at 3000 mcg RAE/day (approximately 10,000 IU) for adults. Chronic intake above this level may cause Hypervitaminosis A. In pregnant women, high-dose Vitamin A in Retinol form carries teratogenic risk to the developing fetus. Always consult a doctor before taking any supplement containing Vitamin A.
How to take Blackmores Bio Zinc / Recommended dosage
Blackmores Bio Zinc A Chelate is taken as follows:
General adult dosage: 1 tablet once daily, or as directed by a doctor or pharmacist.
Timing: Take with food. Zinc taken on an empty stomach may cause nausea even in chelated form, which is gentler than sulfate but not entirely without gastric effect.
Zinc RDA: The NIH Recommended Dietary Allowance for zinc is 11 mg/day (men) and 8 mg/day (women) — the range most zinc supplements are formulated to support.
Upper Limit (UL): The NIH sets the UL for zinc at 40 mg/day from all sources combined (food plus supplements). Chronic intake above the UL may impair copper absorption and may reduce HDL (good cholesterol) levels.
Do not chew or crush: Swallow whole with water.
If a dose is missed, take it as soon as you remember. If it is almost time for the next dose, skip the missed dose and continue the regular schedule. Do not double the dose to compensate.
Blackmores Bio Zinc side effects & risks of long-term excess
Blackmores Bio Zinc A Chelate is generally safe at recommended doses. However, the following side effects and risks should be understood:
Common (mainly on empty stomach): Nausea, vomiting, stomach pain, indigestion — reduced by always taking with food. Chelated zinc causes less gastric irritation than zinc sulfate.
⚠️ Copper deficiency from excess zinc: Zinc and copper compete for intestinal absorption. Long-term intake above 40 mg/day (the UL) may impair copper absorption, leading to copper deficiency. Consequences can include anemia, neurological problems, and joint issues.
HDL Cholesterol: Some studies have associated high-dose zinc with reductions in HDL (good) cholesterol levels.
Acute symptoms from very high doses: Headache, dizziness, diarrhea, vomiting.
Vitamin A — fat-soluble accumulation: Vitamin A is fat-soluble and accumulates in the liver. Chronic intake above the UL (3000 mcg RAE/day) may cause Hypervitaminosis A, with symptoms including headache, nausea, skin peeling, and liver problems.
Always take at the recommended label dose and avoid combining multiple zinc supplements simultaneously.
Contraindications / Drug and supplement interactions
Before taking Blackmores Bio Zinc A Chelate, be aware of the following important interactions:
⚠️ Quinolone antibiotics (Ciprofloxacin, Levofloxacin) and Tetracyclines: Zinc binds to these antibiotics in the gastrointestinal tract, significantly reducing antibiotic absorption. Take zinc at least 2 hours before or after these antibiotics.
⚠️ High-dose Calcium and Iron: Concurrent intake may reduce zinc absorption. Space doses at least 2 hours apart.
⚠️ Penicillamine (for Rheumatoid Arthritis and Wilson's Disease): Zinc reduces Penicillamine absorption. Take separately.
Copper supplementation: Long-term zinc use may warrant separate copper supplementation to maintain mineral balance. Consult a pharmacist.
⚠️ Pregnant and breastfeeding women: High-dose Retinol-form Vitamin A is teratogenic. Never take Blackmores Bio Zinc A Chelate or any Vitamin A-containing supplement during pregnancy without first consulting a doctor.
Thiazide diuretics: May increase urinary zinc excretion. Consult your doctor if taking diuretics.
Where to buy Blackmores Bio Zinc?
Where to buy Blackmores Bio Zinc A Chelate?
Order genuine Blackmores Bio Zinc A Chelate 90 Tablets at Intimo Life. Delivery across Thailand in 1–3 business days. Shipped in discreet packaging — product name is not indicated on the outer box. Browse all zinc products at Intimo Life Zinc Collection
Always take Blackmores Bio Zinc A Chelate with food — any meal works, whether breakfast, lunch, or dinner. Zinc taken on an empty stomach commonly causes nausea, even in the gentler chelated form. Consistency matters most: choose a meal that is easy to remember and maintain every day. If you are also taking antibiotics, space your zinc dose at least 2 hours away from the antibiotic.
Zinc at recommended doses (within the 40 mg/day UL) can be taken daily on an ongoing basis. The NIH does not specify a requirement to cycle off for those taking normal supplemental amounts. However, if you take zinc for more than 3 months continuously, inform your doctor so copper status can be assessed — zinc competes with copper for absorption, and long-term copper depletion can cause anemia and neurological issues.
Studies have found that serum zinc levels are often below normal in individuals with acne. Zinc plays roles in processes relevant to skin health, including wound healing, anti-inflammatory signaling, and sebum production regulation. Healthline notes zinc's supportive role in skin health. However, zinc supplements are not a medicine for acne — outcomes vary depending on the underlying cause in each individual. For persistent or severe acne, consult a dermatologist for appropriate treatment.
Pregnant and breastfeeding women must consult a doctor before taking Blackmores Bio Zinc A Chelate. The critical reason is that this product contains Vitamin A in Retinol form — the NIH notes that high-dose Retinol carries teratogenic risk (potential harm to fetal development). Your doctor can assess whether this product is appropriate, and if zinc supplementation is needed, may recommend a formulation without Vitamin A or a suitable prenatal vitamin instead.
Zinc has a significant interaction with several antibiotic classes: Quinolones (e.g., Ciprofloxacin, Levofloxacin, Norfloxacin) and Tetracyclines (e.g., Doxycycline) — zinc chelates with these antibiotics in the gastrointestinal tract, reducing the absorption of both the antibiotic and the zinc. If taking these antibiotics, take zinc at least 2 hours before the antibiotic or 4–6 hours after to allow the antibiotic to be properly absorbed. Always consult a pharmacist when combining multiple medications and supplements.
Amino Acid Chelate zinc in Blackmores Bio Zinc outperforms Zinc Sulfate or Zinc Oxide in three ways: (1) Better absorption — zinc bound to amino acids is taken up via highly efficient amino acid transporter channels in the intestinal wall; (2) Less gastric irritation — chelated zinc does not irritate the stomach lining the way zinc sulfate can on an empty stomach; (3) Less competition with other minerals — reduced interference with Iron and Calcium absorption in the gut. Ideal for those wanting maximum bioavailability from their zinc supplement.
MedlinePlus and the NIH list the following signs of zinc deficiency: excessive hair loss, brittle nails or white spots on nails, slow wound healing, impaired immunity (frequent infections), altered taste and smell (hypogeusia/anosmia), chronic diarrhea, dry skin or rash, and in children, stunted growth. High-risk groups include older adults, vegetarians and vegans (plant-source zinc is less bioavailable), and those with gastrointestinal conditions. If zinc deficiency is suspected, a blood test with your doctor is recommended before beginning supplementation.
Blackmores Bio Zinc A Chelate stands out through: (1) Amino Acid Chelate form — superior absorption and lower gastric irritation compared with budget zinc products that use Zinc Sulfate or Zinc Oxide; (2) Vitamin A inclusion — works synergistically with zinc in Vitamin A transport, the visual cycle, and immune function; (3) Blackmores brand from Australia, established 1932, manufactured to international quality standards. Available at Intimo Life — genuine product, delivered discreetly across Thailand. Browse all zinc products at Intimo Life Zinc Collection
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