Fermented foods like this green‑tea‑based kombucha can be a tasty way to support everyday wellness: the live cultures formed during fermentation may help maintain a healthy gut microbiome, while organic acids (such as acetic and gluconic acids) and B‑vitamins produced in the brew can aid digestion and make the drink feel naturally refreshing with less residual sugar than the starting tea. Crafted for readers following Dr. Peter J. D’Adamo’s guidance for Blood Type O, this recipe skips black tea and leans on gentle green teas (e.g., bancha, genmaicha, or kukicha), aligning with his recommendation that Type O individuals avoid black tea while still delivering the crisp, bright character people love in kombucha. As with any fermented food, individual tolerance varies—so start small and pay attention to how you feel.

Kombucha Blood Type O

Kombucha Blood Type O
Barefoot Betters

Kombucha Blood Type O

A green-tea-based kombucha crafted for Blood Type O—skips black tea in favor of gentle green, white, and oolong teas, then flavored with mango and cayenne.

IngredientsMethod
Prep20 min
Total20 min
  • Servings 16 servings
  • Course Drink

Ingredients

Steep the tea
Pitch the SCOBY
Second ferment (flavoring)

Equipment

  • 1-gallon glass jar
  • Coffee filter + rubber band
  • Swing-top glass bottles

Method

  1. Steep the tea. Bring 2 cups water to a boil, add all the teas, and steep. Stir in 1 cup organic cane sugar until dissolved. Cool to room temperature and remove the tea leaves or bags.
  2. Pitch the SCOBY. In a 1-gallon glass jar, combine 3 quarts room-temperature water, the 2 cups sweet tea, the SCOBY, and 1 cup starter tea.
  3. First ferment. Cover the jar with a coffee filter secured by a rubber band. Set on the counter out of direct sunlight and ferment 6 days.
  4. Second ferment. Pour the fermented kombucha into swing-top glass bottles with a little mango juice and a pinch of cayenne. Seal and let carbonate 1–3 days, then refrigerate.

Notes

  • Plus about 6 days for the first ferment and 1–3 days for the second (flavoring) ferment.
  • Crafted for Blood Type O—skips black tea and uses gentle green teas per Dr. D’Adamo. See the Blood Type O tea and juice lists below.

Where it lands on the Intestinal food lists

A functional drink like this leans on supplements and superfoods that predate Mein’’s 1997 food lists, so only some ingredients map — here’’s how those score for the Intestinal body type:

Intestinal body type Fine in rotation

Every mapped food sits at “Moderately” for this type — fine in rotation, not a daily staple.

  • Green tea Moderately holds under stress
  • Chinese oolong tea Moderately holds under stress
  • Refined cane sugar Moderately slides to Rarely under stress

Scored against Carolyn Mein’s Intestinal Profile. See the full Healthy vs. Sensitive crosswalk.

Highly Beneficial Teas and Juices for Blood Type O

Teas

  1. Cayenne tea
  2. Chickweed tea
  3. Club soda
  4. Dandelion tea
    • Herbally Grounded $31.68 per lb
  5. Fenugreek tea
  6. Gingerroot tea
  7. Green tea (bancha, genmaicha, kukicha)
  8. Hops tea
    • Botanical Name: Humulus Lupulus
    • Herbally Grounded $46.08 per lb
  9. Linden tea
  10. Mulberry tea
  11. Parsley tea
  12. Peppermint tea
    • Herbally Grounded $23.68 per lb
  13. Rose hips tea
    • Herbally Grounded $22.08 per lb
  14. Sarsaparilla tea
  15. Seltzer water
  16. Slippery elm tea

Juices

  1. Black Cherry juice
  2. Blueberry juice
  3. Cherry juice
  4. Guava juice
  5. Mango juice
  6. Pineapple juice
  7. Prune juice
  8. Vegetable juice (from Highly Beneficial vegetables)

Neutral Teas and Juices for Blood Type O

  1. Catnip tea
  2. Chamomile tea
  3. Dong quai tea
  4. Elder tea
  5. Ginseng tea
  6. Goji berry tea
  7. Hawthorn tea
  8. Horehound tea
  9. Licorice root tea
  10. Mullein tea
  11. Peppermint tea
  12. Raspberry leaf tea
    • good replacement for black tea
    • Herbally Grounded $41.28 per lb
  13. Sage tea
  14. Skullcap tea
  15. Spearmint tea
  16. Thyme tea
  17. Valerian tea
  18. Vervain tea
  19. White birch tea
  20. White oak tea
  21. Yarrow tea
  22. Yerba Maté tea

Juices

  1. Apple cider
  2. Apple juice
  3. Apricot juice
  4. Beet juice
  5. Cabbage juice
  6. Carrot juice
  7. Celery juice
  8. Coconut water
  9. Cranberry juice
  10. Elderberry juice
  11. Grapefruit juice
  12. Grape juice
  13. Lemon and water
  14. Lime juice
  15. Milk, almond
  16. Milk, rice
  17. Milk, soy
  18. Nectarine juice
  19. Noni juice
  20. Papaya juice
  21. Pear juice
  22. Pomegranate juice
  23. Tomato juice
  24. Vegetable juice (from Neutral vegetables)
  25. Watermelon juice
  26. Wine, red

Avoid these teas for Blood Type O

  1. Alfalfa tea
  2. Aloe juice
  3. Aloe tea
  4. Beer
  5. Blackberry juice
  6. Black tea, all forms
  7. Burdock tea
  8. Coconut milk
  9. Coffee
  10. Coltsfoot tea
  11. Corn silk tea
  12. Cucumber juice
  13. Echinacea tea
  14. Gentian tea
  15. Goldenseal tea
  16. Liquor, distilled
  17. Orange juice
  18. Red clover tea
  19. Rhubarb tea
  20. Saint John’s wort tea
  21. Senna tea
  22. Shepherd’s purse tea
  23. Soda, pop (such as colas and diet colas)
  24. Strawberry leaf tea
  25. Tangerine juice
  26. Wine, white
  27. Yellow dock tea

Caffeine Ranges

Beverages, Tea, and CoffeeCaffeine in 8 oz (240 mL)
Red Rooibos tea0 mg
White tea15-30 mg
Green tea20-45 mg
Oolong tea30-55 mg
Mountain Dew (classic)36 mg
Black tea40-70 mg
Yerba Mate tea70-80 mg
Coffee80-100 mg
Monster Energy80 mg
Mountain Dew Energy90 mg

Additional Information

If you have any questions, don’t hesitate to get in touch with me on my Contact Page

The next blog post I recommend you read Potassium Drink