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OrganicOzarks
USDA NOP (National Organic Program) - Seaweed Extracts
NOP Rule: 205.601(j)(1)
Verbatim
Acadian Seaplants, Ltd. products are listed & registered under this rule as is Maxicrop.
So I talked with my supplier this morning for an hour. Always so much info from him. They do indeed manufacture this themselves. They use their own process separate from the companies that you have listed.
They could not divulge proprietary info, but we did go over chemical analysis, and I asked 20 questions about the process, and the testing results form said process.
I feel very comfortable using their product still, and would still recommend it over kelp meal.
Although I 100% see why you would bring up what you brought up, and if there is any question whatsoever of safety it would be non-existent by using kelp meal.
Again I really appreciate you bringing this to my attention as I have learned a lot today.