In following the last survey made in 1961 for ratio of thiamine and riboflavin contents to the amounts expected to be added to vatious enriched foods, further investigation was carried out in 1966 for 349 items of thiamine enriched and 121 items of riboflavin enriched foods. The results showed some improvement that 54% of the former items and 72% of the latter items fell within 60 -119% of vitamins found to the amounts to be enriched.
