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Athletes Advantage extracts the acids from a raw material called Leonardite. Athletes Advantage obtains a high quailty Leonardite from the USA. Leonardite contains approximately 80% Humic and Fulvic acids.

The extracted Humic Acid (which is a dark brown colour) and contains approximately 10% – 20% Fulvic Acid (which is a yellow coloured acid).

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Hypothetical model structure of fulvic acid (Buffle's model) contains both aromatic and aliphatic structures, both extensively substituted with oxygen - containing functional groups.