Amount of Zinc in High-Zinc Rice
The provided evidence does not contain information about "high-zinc rice" as a dietary product or food item. The guidelines and research focus on zinc supplementation in clinical contexts (parenteral/enteral nutrition, deficiency treatment) rather than zinc content in food products.
What the Evidence Actually Addresses
The available evidence discusses:
Clinical Zinc Supplementation Doses 1:
- Acquired zinc deficiency treatment: 0.5-1 mg/kg per day of elemental zinc orally for 3-4 months
- Acrodermatitis enteropathica: 3 mg/kg per day of elemental zinc lifelong
- Parenteral nutrition with GI losses: up to 12 mg/day IV
- Major burns: 30-35 mg/day IV for 2-3 weeks
Biofortified Rice Research 2, 3, 4:
- Standard polished rice contains approximately 16 μg/g (16 mg/kg) zinc 2
- HarvestPlus biofortification targets 28 μg/g (28 mg/kg) zinc in polished rice 2
- Transgenic biofortified rice achieved 45.7 μg/g (45.7 mg/kg) zinc in polished grain under field conditions 2
- After parboiling and milling, zinc retention ranges from 49.8-72.2% 4
Practical Context
If you are asking about biofortified "high-zinc" rice:
- A typical 150g serving of standard polished rice contains approximately 2.4 mg elemental zinc
- A 150g serving of biofortified rice (28 mg/kg target) would contain approximately 4.2 mg elemental zinc
- Advanced biofortified varieties (45 mg/kg) would provide approximately 6.8 mg elemental zinc per 150g serving
Important Caveats:
- These values represent raw rice; cooking and processing reduce zinc content by 20-50% 4
- Phytates in rice reduce zinc bioavailability 1
- The question cannot be definitively answered without knowing which specific "high-zinc rice" product is being referenced
The evidence provided does not support making clinical recommendations about "high-zinc rice" as a therapeutic intervention for zinc deficiency, as this falls outside the scope of the clinical guidelines and research presented.