Does it contain hormones?

Greetings from Daiwa! Peak immune 4 is a proprietary immune-enhancing complex that doesn't contain hormones. Thanks for your inquiry!

What will be the expiry date (newest stock), If I order by early November ?

Greetings from Daiwa! Daiwa Peak Immune 4 Natural Immune System Booster currently in stock expires Dec 29, 2023. Thanks for your inquiry!

Hi, Is this the same as AHCC, Noxylane4, BRM4. I used MGN3 which was pulled then Noxylane4 but they raised the price. Thanks so much....Steve

Hello and Greetings from Daiwa Health Development! AHCC is different from PeakImmune4, BRM4 and Noxylane4. It is a blend of three mushrooms. The active ingredient in PeakImmune4, BRM4 and Noxylane4 is Rice Bran Arabinoylan Compound (RBAC). RBAC is derived from an extract from rice bran that is broken down into a smaller molecule in a fermentation process using a very small amount of an enzyme complex from Shitake mushroom. Although AHCC and PeakImmune4 work similarly on the immune system, primarily through white blood cells, PeakImmune4 has a much greater impact. The two key areas that PeakImmune4 has increases macrophage activity to a much greater extent and is effective at lower dosage levels than AHCC. Research studies show that AHCC does not have an effect in humans on NK cells (an important white blood cell) below 2g/day, while PeakImmune4 starts to increase NK cell activity at 500mg. This translates to a lower cost per daily dose for PeakImmune4. PeakImmune4 and BRM4 are the same, both are made by Daiwa Health Development. They are supported by dozens of research and case studies. While Noxylane4 does contain RBAC, it also contains another ingredient, Heated Algae Ingredient (HAI). It is not known if HAI compromises the efficacy of RBAC. All the research studies were done with only RBAC without HAI. Thanks for the great question!

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Reviews

S**Y

Great Price

Been using this for years. Great Immune support supplement!

6.10.2025

B**K

Great product, too expensive

The product is great! I can not longer afford it because of the increase in price. No doubt there are quality substitutions at a reasonable price.

15.09.2025

D**P

Worth trying for sure.

One of the best products out there for supplemental good health.

29.07.2025

M**M

Our doctor recommended this

This was recommended to us by our doctor, to strengthen the immune system. Using it for a few months, and it does seem to support the other treatments. I wish it was available as a subscription with a discount, since it is very expensive.

1.10.2023

D**R

Beware unlisted ingredients!

BEWARE! Contains Magnesium Stearate The ingredients list in the ad is incomplete. For me Magnesium Stearate triggers migraines, so this is a total waste, as returns are not allowed. Should be 0 stars.

6.01.2026

A**E

Taking care of my gut health AND immune health

This product is a fantastic 2 for 1! You can take care of your gut health and your immune health in 1 tablet. Daiwa GastroImmune did wonders for my gut. I didn't know I needed an immunoglobulin supplement but it works wonders on supporting my digestion and has even help alleviate my IBS. Knowing that I'm also improving my immune system gives me the peace of mind that I'm doing the best for my body. Really love this product and trust this brand.

21.07.2023

M**R

Was skeptical but....

I bought this because of the reviews and because the health scare at the moment is crazy. I started to feel my throat swelling up and slight cough here and there so I took a chance that this will somehow help me out. I have been taking these for the past 5 days and I must say, they are holding me up pretty well. My cough has gone away but I have slight tightness at the throat which I can tolerate. This stuff slowly but surely has boosted up my immune system and I am very grateful for that. The amount you need to take daily is quite much...I just ended up taking 2 in the morning and 2 at the night which worked out fine.

9.03.2020

A**R

Excellent product and quick delivery.

18.07.2025

ASIN	B003FISNBC
Best Sellers Rank	#76,150 in Health & Household ( See Top 100 in Health & Household ) #425 in Mushrooms Herbal Supplements
Customer Reviews	4.2 4.2 out of 5 stars (271)
Date First Available	January 8, 2008
Is Discontinued By Manufacturer	No
Item model number	269A
Manufacturer	DAIWA HEALTH DEVELOPMENT
Product Dimensions	6 x 6 x 6 inches; 1.76 ounces

Daiwa PeakImmune4® – Immune Support Supplement for Adults with Rice Bran Arabinoxylan Compound (RBAC) and Enzyme from Shiitake Mushroom – 50 Capsules

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