Natrogix via Amazon offers the Natrogix Green Superfood Powder for $19.99. Coupon code "Y4A7D6CW" cuts the price to $12.99. Plus, Prime members bag free shipping. That's tied with our mention from two weeks ago, $23 off, and the lowest price we could find. It features 32 organic real food ingredients, including spirulina, acai berry, and spinach.