Natrogix via Amazon offers the Natrogix Green Superfood Powder for $19.99. Coupon code "4J7RGRF9" cuts the price to $12.99. Plus, Prime members bag free shipping. That's $7 off and the lowest price we could find, although it was $2 less last month. It features features 32 organic real food ingredients, including spirulina, acai berry, and spinach.