A 4-month-old previously healthy female presented with persistent nonbloody, nonbilious emesis, decreased urine output, weight loss, fussiness, and lethargy. Serum levels of calcium were increased at 14.1 mg/dL, serum phosphate decreased at 1.6 mg/dL, and serum parathyroid hormone decreased at <4 pg/mL. The patient had been consuming unsweetened almond milk due to inability to find infant formula during a national infant formula shortage. Milk alternatives including almond milk are calorie-poor, low fat, low protein, and too high in free water and calcium to safely be the primary nutrition source for infants.
Keywords: alternative formula; hypophosphatemia; plant milk.
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