Hemp is being hailed as a wonder food and a Sussex company is developing new recipes and medicines using the plant.
Scientists at Firle-based MotherHemp say tests have shown hempseed oil dramatically relieves the symptoms of eczema and patients taking the oil were less likely to suffer from colds and 'flu.
The latest product to come from the firm is a cereal bar based on hemp seed, fruit and cereal, which it is now available at Sainsbury's.
MotherHemp, the UK's leading supplier of hemp food products, has announced the results of the world's first clinical trial on hempseed oil.
Scientific advisor Dr Jace Callaway said early indications showed the oil taken orally had reduced the symptoms of eczema.
He said: "We also noticed a reduction in the frequency of influenza when these patients were taking hempseed oil."
Hempseed oil is a relatively new product in the West but it has been used for years as an inexpensive substitute for butter in many Eastern European countries.
Dr Callaway said: "The oil is an exceptional source of the fatty acids that are essential in our daily diet because, like vitamins, we can't produce them on our own.
"Judging from the fatty acid profile of hempseed oil, the numerous anecdotal reports over the years and the results of our initial clinical investigations, I'd have to conclude this is probably the healthiest oil on the market.
"This is an important and useful discovery that will need to be investigated further."
MotherHemp, established in February 1998, manufactures and supplies hemp-derived products to retail and wholesale markets.
The company has exclusive rights to Finola variety hemp seed in Europe.
Marketing manager Sarah Yearsley said: "Like soya beans, hemp seeds can be made into numerous nutritious food products.
"Once they are ground, soaked and crushed for their oil content, the resulting seed cake can be used for flour to make bread, cakes, pasta, and biscuits - an ideal alternative for special diets.
"In addition, the soaked seeds can be made into a milk, ice cream and nondairy cheeses."
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