Item# Name Size & Form Brand Price Actions
Item# 1589415894 Dr. Nanbas Maitake Beta-Factor Liquid
by Planetary FormulasPlanetary Formulas $22.39 Wishlist
2 pack - $44.78
3 pack - $67.17
6 pack - $134.34
12 pack - $268.68
Dr. Nanbas Maitake Beta-Factor Liquid

Supplement Facts

Serving Size: 27 Drops (~1.25ml)
Servings Per Container: 47

Amount per
% Daily*

Vitamin C (as ascorbic acid)




Maitake (beta-glucan) fraction




*Percent Daily Values are based on the 2000 Calorie Diet. Your daily values may be higher or lower depending on your calorie needs.
**Daily value not established.

Other Ingredients:
distilled water, vegetable glycerin.

Warning: If you are pregnant or breastfeeding, consult your health care professional before using this product.

Suggested Use: 40 drops 1 to 2 times daily between meals.

Botanical Immune Support

Dr. Nanba's Maitake Beta-FactorLiquid by Planetary Herbals contains Dr. Nanba's unique MaitakeGold 404™ beta-glucan fraction, the fully mature fruiting body and mycelium. This provides a complete spectrum of maitake activity.

Lifestyle Recommendations: To support immune defenses, get enough rest, drink plenty of pure water, exercise regularly, avoid excessive stress and supplement the diet with antioxidant nutrients.

With Maitake Gold 404™ – Endorsed by Leading Maitake Researcher, Dr. Hiroaki Nanba!

The maitake mushroom has a long history of traditional use, but it is only recently that modern science has made possible the creation of a highly specialized maitake product, rich in beta-glucans. Planetary Formulas now offers Dr. Nanba's Maitake Beta Factor, which contains MaitakeGold 404™*, the only maitake extract endorsed by the world’s premier maitake researcher, Dr. Hiroaki Nanba, Ph.D.

Dr. Nanba's Maitake Beta Factor combines MaitakeGold 404™*—a specialized beta-glucan fraction believed to have important healthpromoting properties—with maitake fruiting body, maitake mycelia biomass, calcium, and vitamin C. This blend offers you a Full Spectrum™ of maitake activity.

Rich Source of Polysaccharides

Maitake is a rare edible mushroom that is native to northern Japan. In Japanese maitake means “Dancing Mushroom,” because people would dance for joy when they found it in deep mountain valleys.

Maitake is a rich source of polysaccharides— compounds found in some plants that are increasingly recognized for their ability to support the body’s immune defenses. Maitake’s benefits are thought to be due to specific polysaccharides known as beta-glucans, which are polysaccharides bound to proteins.

Dr. Nanba’s Discovery

Dr. Hiroaki Nanba is a professor in the Department of Microbial Chemistry at Kobe Pharmaceutical University in Kobe, Japan. He has a Ph.D. in Biochemistry and Immunology from Kyoto University, and is an award-winning researcher on the benefits and activities of medicinal mushrooms. He is also the author of four books and numerous peer-reviewed articles, including key studies on the benefits of maitake.

Dr. Nanba invented the process for producing the material known as Maitake DFraction. He created this term to define a polysaccharide contained in maitake. More recently Dr. Nanba further refined this fraction.

Dr. Nanba’s research led to the discovery of the specialized beta-glucan fraction known as MaitakeGold 404™. Additionally, clinical research with maitake often utilizes the mature fruiting body with a small amount of vitamin C. This is added to enhance the effects of maitake, since vitamin C has its own immuno-supporting properties. And, added to this, is the maitake fruiting body and mycelium biomass.

The result: Dr. Nanba's Maitake Beta Factor, using MaitakeGold 404™, the only maitake fraction endorsed by Dr. Nanba.

Clinically Derived Formulas

Dr. Nanba's Maitake Beta Factor is part of a line of products that draw on the wisdom of traditional cultures and the new knowledge gleaned from scientific research, providing the best of what modern herbalism has to offer.

All Planetary Formulas products are developed or selected by acupuncturist, herbalist and author Michael Tierra, L.Ac., O.M.D., and used on a daily basis in his clinical practice. The result: premier botanicals, unsurpassed for dependability and customer satisfaction.


Mayell, Mark. 2001. Maitake extracts and their therapeutic potential – a review. Altern Med Rev. (6)1:48-60.
Nanba, Hiroaki, M.D. 2000. Effects of maitake glucan ... Mycoscience. 41:293-6.
Nanba, Hiroaki, M.D. 1993. … activity of orally administered “D-fraction” from maitake mushroom (Grifola frondosa). J. Naturopathic Med (4)1:10-15.

Dr. Hiroaki Nanba is a professor at Kobe Pharmaceutical University, Japan. He has a Ph.D. in Biochemistry and Immunology and is an award-winning researcher on medicinal mushrooms.

*MaitakeGold 404™ is a trademark of the Tradeworks Group, Inc., and is protected under U. S. Patent # 5,854,404.

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*Statements on this site have not been evaluated by the Food and Drug Administration. Products on this site are not intended to diagnose, treat, cure, or prevent any disease.

Prices are subject to change at anytime and without notice. The majority of the product information has been reprinted from the manufacturer.