Nutrients/Active Ingredients:  Maca has been called Peruvian ginseng.  Contains protein, fiber, vitamin C, K, E, copper, iron, potassium, vitamin B6 and manganese.  Contains polyphenols (antioxidant) and glucosinolates.  The family of this group consist of foods like mustards, cabbages, horseradish, kale, and Brussel sprouts. 
Uses by system and symptom: 
Cardiovascular: May lower blood pressure.
Endocrine: Most commonly used as an adaptogen and may decrease cortisol level.  May help with weight loss associated with stress. 
Integumentary/Skin: may provide UV protection when applied to skin.  
Muscular:  Used a a supplement for energy for body building and athletes
Nervous: Used for  insomnia, irritability, memory and learning.
Male/Female Reproductive:  Used for menopause symptoms like hot flashes, vaginal dryness, mood swings.   Has been used for 
Benign Prostatic Hypertrophy (BPH) 
Common doses and preparation:  Has a nut taste. You can add some to smoothies, cereal, oatmeal, soups, baked goods, and energy bars.  People often start with 1/2 teaspoon and work up to about 1 tablespoon. 
Side Effects/Precautions/Interactions:  Contains vitamin K.  Caution If you are taking blood thinners, pregnancy, breast feeding, certain cancers, and uterine conditions. 
* This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. For educational purposes only. We recommend speaking with a physician or health care professions, especially if you have medical conditions, are pregnant or lactating, on medications, or use with children and infants.