Possible Clues:

• Wheat germ, bean sprouts et al
• *Kale, quinoa, etc
• Oily fish, greens and chia seeds of hotel had gone off
• Good eats
• Flaxseed or quinoa, e.g
• Nutritionist's recommendation
• Gangster passing round flat, he tampered with contents of fitness fanatic's fridge
• Bean sprouts, tofu, etc.