Nutritional fact sheets like this one
http://www.peruvianheritage.com/en/maca_fichatecnica_ing.html
indeed mention the high selenium content, and the ideal ratio of 0.76 saturated to unsaturated fat. But those are properties of the maca root itself, so any decent maca supplement will do. Almost all maca is peruvian, it only grows there and in two neighboring countries.
Be careful with the dosage if you use an extract: it may be concentrated 4:1 or 6:1. In that case, divide the dose you would normally take by 4 or by 6. Then 1000 mg is indeed enough.
http://www.peruvianheritage.com/en/maca_fichatecnica_ing.html
indeed mention the high selenium content, and the ideal ratio of 0.76 saturated to unsaturated fat. But those are properties of the maca root itself, so any decent maca supplement will do. Almost all maca is peruvian, it only grows there and in two neighboring countries.
Be careful with the dosage if you use an extract: it may be concentrated 4:1 or 6:1. In that case, divide the dose you would normally take by 4 or by 6. Then 1000 mg is indeed enough.