Almond milk is no longer a health food niche product. Last year national sales were up 40%, according to Nielson data. Today's market is worth more than $700 million dollars a year. That's good news for California where virtually all the nation's almonds are grown.
But some dieticians question its nutritional value.
Almond milk dates back to the Middle Ages when Catholics and Muslims drank it during religious periods when animal products were banned.
Today's popularity is mostly driven by people who want a dairy substitute.