A visit to Shrublands health farm in Thunderball proves to be something of an culinary eye-opener for James Bond. Foregoing his usual steaks, fried fish, and rich sauces, Bond is introduced to such treats as dandelion tea, potassium broth and 'unmalted slippery elm'.
Nobody can deny that James Bond hasn't suffered in the course of his duties: in Thunderball, he's obliged to drink carrot juice.
Patricia Fearing saves James Bond twice when he's trapped on 'the rack' in Thunderball: first from the traction machine itself, the second time from the threat of dandelion tea.
James Bond's diet at Shrublands health farm, as described in Thunderball, includes a mug of vegetable soup. The soup may be something like the potassium broth that Bond learns about while reading Nature Cure Explained by Alan Moyle.