Item# Name Size & Form Brand Price Retail Actions
Item# 1546515465 PeakImmune4 250mg (AKA Biobran)
by Daiwa PharmaceuticalDaiwa Pharmaceutical $47.99 (retail $59.99)$59.99 Wishlist
PeakImmune4 250mg (AKA Biobran)

Supplement Facts

Serving Size: 4 Capsules

Amount per
% Daily*

Total Fat




   Saturated Fat




Total Carbohydrate








   Dietary Fiber








Proprietary RBAC† Blend:

(Rice Bran, Hyphomecetes Mycelian Extract [from Shiitake Mushroom])




*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.

†RBAC (Rice Bran Arabinoxylan Compound)

Ingredients: Proprietary RBAC† Blend, Microcrystalline Cellulose, Hypromellose, Sucrose Fatty Acid Ester, Silica, Gellan Gum, Potassium Acetate

Suggested Use: As a dietary supplement, take four (4) capsules before or after a meal. For the best results, the following two-step program is recommended:

1st Step: Take 4 capsules 3 times per day for 4 weeks.

2nd Step: After 4 weeks, reduce dosage to the maintenance level of 4 capsules daily.

Warnings: Consult with your health care professional prior to use if you are pregnant, nursing or are being treated for any medical condition or are taking any medication. Do not use if seal is broken or missing. Keep out of reach of children.

PeakImmune4™ is a dietary supplement which contains 250mg of Rice Bran Arabinoxylan Compound (RBAC) which has been scientifically shown to support the immune system, especially NK cell activity. Although Rice Bran Arabinoxylan Compound (RBAC), the main component to optimize the immune system, is contained in common grain (rice, wheat, corn, etc), it cannot be assimilated in our stomach because of its large molecular size. Daiwa Pharmaceutical, Co., Ltd, the parent company of DHD USA, has made it possible to break down the size of the molecule by application of its patented technology. PeakImmune4™ is distributed over 30 countries under different names. We here at DHD USA strongly believe that this product improves your Quality of Life (QOL).

From the makers of the very popular BioBran MGN-3 sold in Europe and for a short time the USA, comes PeakImmune4. PeakImmune4 is the same as BioBran, it's the same formula made by the same company (Daiwa Pharmaceutical Co., Ltd.). Except for the few boxes still on the shelf, BioBran is no longer available for sale in the USA. Also Daiwa has dropped the price so PeakImmune4 is much cheaper than BioBran ever was. Same product, just a new name and a new price!

Note: PeakImmune4 is in Capsule form rather than Tablet, so some of the inactive ingredients are different.

At the bottom of this page you will find excerpts from an email sent to us by a representative of Daiwa Health Development.

Useful PeakImmune4™ link (Sold in Europe under the name BioBran):

Daiwa Pharm's Japanese website

Excerpts from an email sent to us by a representative of Daiwa Health Development...

I understand the customers concern.

The only difference between the two is the excipients used. BioBran is a tablet and PeakImmune4 is a capsule. A vegetable gelatin is used to make the capsule and this is the reason for the slight difference in calories as stated on the label.

Some background information may help:
Daiwa Pharmaceutical manufactures the active referred to as either BioBran or BioBran MGN-3. The active is an Arabinoxylan compound derived from rice bran. Daiwa also makes supplements from the active that are sold in Asia under the names, BioBran MGN-3, BioBran 250 and BioBran 1000. The different brand names are used in different Asian countries.

Daiwa allowed BioBran supplements to be sold in the US from two sources. One form was a supplement originally made by Daiwa for sale in Asia. This was sold by a broker to stores primarily located in the Midwest. The other source of Biobran was from Daiwa's distributor in Europe.

Several months before PeakImmune4 was introduced supply from both sources stopped.

We can supply a letter certifying that Daiwa Health Development is a subsidiary of the manufacturer of BioBran and BioBran is the active in PeakImmune4 and a Certificate of Analysis on our raw material, BioBran, from Daiwa Pharmaceutical.

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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.