Related Clues:

• "The caveman diet"
• Modern diet based on a nonmodern era
• Hunter-gatherer diet
• Diet based on the eating habits of early humans
• Diet that permits walnuts but not peanuts
• Diet less restrictive than keto
• 'Caveman diet,' familiarly
• Diet that precludes grains and dairy
• Stone-age diet
• Prefix meaning "primitive"
• "Caveman diet"
• 'Ancient' diet
• Prefix with -lithic or -zoic
• Prefix meaning 'ancient'
• Kind of diet that eschews processed foods