The answer to this question depends on your view of natural. Some natural paint consists of purely natural substances, these however can be equally toxic as the ones used in other paints. Moose Färg is based on (treated) linseed oil and other vegetable oils and its other components are mostly of natural origin like the earth pigments uses in red, black, white and yellow. Strictly speaking Moose Färg is not a completely natural paint. It does not contain any harmfull substances and is environmentally degradable.