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Rat's diet contained casein, lard, & yeast Casein contains "vit" A: https://t.co/NEccU1YQCQ https://t.co/XoI9HhE8GB Lard contains "vit" A: https://t.co/EQH35kFTma https://t.co/1y1WIKAhtl Yeast ⬆️ "vit" A toxicity: https://t.co/BJl74zy9PQ It was NOT