Caviar and fish eggs are most often eaten as a garnish or spread. The eggs of whitefish contain the most vitamin B-12 with 56.4μg (940% RDA) per 100g serving. Caviar contains a third of that with 20μg (333% RDA) of vitamin B12 per 100g serving, 5.6μg (93% RDA) per ounce, and 3.2μg (53% RDA) per tablespoon. Chicken eggs, by comparison, only offer 1.29μg (22% RDA) of vitamin B-12 per 100g serving, or 0.65μg (11% RDA) per egg.