Type O produces more stomach acid and digestive enzymes than any other type, so you break down animal protein and fat efficiently. The flip side: your body handles grains and dairy poorly — wheat and other lectins can interfere with your metabolism and slow an already thyroid-sensitive system, which is why gluten and dairy tend to show up as bloating and stubborn weight for you.

• Tend toward a sluggish thyroid — iodine-rich foods (seaweed, fish) help
• Higher stomach acid — can trend toward reflux or ulcers if diet is off
• Blood clots a little slower — vitamin-K greens are supportive
• Inflammation and joint stiffness show up faster on grains

• Kelp / bladderwrack

  Iodine source traditionally used to support the Type O thyroid (a common weak point).

• Licorice root

  Traditionally used to support the stomach lining.

• Ginger

  Traditionally used to fire up digestion and calm inflammation.

• Turmeric

  Traditionally used to ease the inflammation Type O is prone to.

• Slippery elm

  Traditionally used to soothe the digestive tract.

Type O responds best to intense movement — lifting, sprints, HIIT. Hard exercise is also your best natural stress reset.