You say whole grain is healthy how is that true if it contain phaytic acid which is antinutrient and cause iron and calcuim defeciency?

Phytic acid. Despite a lot of hype on the Internet and in Paleo diet books, there is no evidence that phytates in the diets cause any mineral deficiencies except in extreme circumstances such as a third world diet or strictly-limited vegetarianism. "Soaking" foods to decrease Phytic acid is most likely a waste of time. Good luck. .