Figure 4From: A soy-based phosphatidylserine/ phosphatidic acid complex (PAS) normalizes the stress reactivity of hypothalamus-pituitary-adrenal-axis in chronically stressed male subjects: a randomized, placebo-controlled study Subject flow chart. PAS 200 group: 200Â mg PA & 200Â mg PS per day; PAS 400 group: 400Â mg PA & 400Â mg PS per day. a one subject spoke only poor German, three subjects fulfilled the criteria for the high stressed subgroup when no additional subject was needed for this subgroup. Back to article page