Firefly Tonics believes it has the natural answer to cold and flu defence this winter.
The health drinks specialist is adding Self Defence to its line-up, a blend of selected fruits and herbs said to be chosen for their “anti-viral and healing properties”.
The formula combines wild orange, apple and lime with echinacea, thyme, Siberian ginseng and cinnamon.
A spokesman said: “It’s a modern day tonic to ignite the immune system and revitalise taste buds during winter months. Research shows there’s huge interest in a drink to boost the immune system.”