Metagenics Adaptan For Nervous Exhaustion: Metagenics Adaptan is a herbal Rehmannia complex based on traditional principles to relieve nervous tension and exhaustion due to ongoing chronic stress or anxiety. Patients feeling wired (anxious) and tired. Metagenics Adaptan contains American ginseng which may help support and nourish adrenal function during times of nervous debility and fatigue. American ginseng also assists healthy pituitary and adrenal function to support resistance to environmental stress. Metagenics Adaptan is free from animal products, dairy protein, lactose, eggs, wheat, nuts, yeast, soy protein and salt. Metagenics Adaptan is free from artificial colours, flavours and preservatives.