This is essentially the exact same product that other manufacturers sell as amino acids or "organic nitrogen"This one stands apart for being a better value over certain other very expensive brands like NPK Industries.Fast acting no frills and mixes well. Very well.I do use a magnetic stirrer to mix this but even when I was mixing by hand it mixed very well.This will not burn your plants.This is NOT loaded with heavy metals.(I research all my plant fertilizers and supplements to ensure they dont contain high amounts of heavy metals before I commit to buying and these guys are doing it right)Organic fertilizers that don't break the bank or contain high levels of biowaste and heavy metals is what you should be on the look out for. This fits the bill so buy with confidence.