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ZeaVision Patent Information
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Patent # 5747544
Method of using pure 3R-3'R stereoisomer of Zeaxanthin to treat or prevent retinal degeneration in humans. 
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Patent # 5854015
Method of making pure 3R-3'R stereoisomer of Zeaxanthin for human ingestion. 
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Patent # RE38009
Zeaxanthin formulation for human ingestion. 