Featured: Sea Buckthorn in BERTRAND

berries of an organic sea-buckthorn in a basket. style rustic. selective focus

Sea Buckthorn, or “Gold of the North Sea” as it is also known, is a real powerhouse. The deciduous shrub with its small orange berries is a wild fruit tree especially suited to growing in the sandy soils of North Germany. Its worth lies less in its appearance than in the contents of its fruit. Packed full of health giving vitamins!

In both our vegan and classical versions, BERTRAND is formulated to contain the goodness of a handful of sea buckthorn berries in every serve. Each berry contains a literal A to Z of vitamins (from vitamin A to Zinc) as well important oils and flavonoids.
In particular, sea buckthorn berries contain very high concentrations of vitamin C, up to seven times as much as in lemons. As well as this, sea buckthorn berries contain important carotenoids, such as β- and γ- carotene and also lycopene in concentrations even higher than in carrots. These vitamins help to prevent the breakdown of cells and help to protect against damaging UV light.

Sourcing and processing of our product

We source our sea buckthorn powder from a family business which has been organically producing sea buckthorn products for over 20 years. The berries are grown and ripened free from pollution and chemical fertilizers in the fields of Werder (Havel), one of Germany’s sunniest regions. The nutritious sea buckthorn berries are gently harvested and dried using a vacuum drying process where the berries are dried under low heat (around 31°C) in a vacuum tube. This process ensures that valuable and sensitive ingredients such as vitamins and minerals are preserved in the dried product.

Featured: Mushrooms in BERTRAND


Mushrooms enrich the menu and bring the body a variety of nutrients. The “meat of the forest” is also included in BERTRAND. Why a mushroom got on the list of ingredients and why its taste cannot be perceived at all, is described in this article.

Both in the classic as well as in the vegan version of BERTRAND the Agaricus bisporus, better known as bisporic mushroom or cultivated mushroom, is an important ingredient. It contains vitamins B2, B3, B5, B7 and B9, and vitamins E and K as well as potassium, iron and zinc. We were not even counting on these nutrients, which we gladly accept, but on the also included and rarely occurring vitamin D.

Vitamin D plays a major role in the regulation of the calcium level in the blood and the bone structure. A vitamin D deficiency, in the medium term, leads to osteomalacia in adults. The nutritional recommendation for vitamin D is currently given as 5 micrograms per day for an average adult. To depict this nutritional recommendation to BERTRAND, the Agaricus bisporus has been found, after a long search, to be an ideal source.

How does it get into our product?

The mushroom derives from controlled organic farming. Since mushrooms, during normal growth and harvesting in the native forest, only have a very low level of vitamin D, we get our mushroom powder from an organic certified company that has developed a process of bringing the levels of vitamin D to a level, which is comparable to dietary supplements. In order to do this, the mushroom is exposed to pulsed UV-B radiation, according to a set procedure, which results in a massive increase in the content of vitamin D2 (ergocalciferol) during a short time span. The amount of powder that we need to reflect the nutritional recommendations in BERTRAND, is so low, that it is no longer distinguishable in taste in the finished product.

1 Bioavailability of vitamin D2 from UV-B-irradiated button mushrooms
2 Paul Stamets, fungi.com: Place Mushrooms in Sunlight to Get Your Vitamin D

Vitamin D2 and D3 have approximately the same effect in humans. With the participation of the liver and kidneys, the active form, the vitamin D hormone calcitriol, originates in the body.

Bertrand Is Gluten-Free

Many people know it: stomach pain, bloating, diarrhea, or even headaches, after enjoying a meal that contains gluten. Being gluten-intolerant means that the folds of the stomach’s mucous membrane become inflamed; the body then can’t absorb enough of nutrients such as carbohydrates, vitamins and minerals. The result: over time, the body becomes undernourished.

Due to increased requests for a gluten-free variety, we decided to adapt the formulas for version 2.5 and the vegan version 1.0, so that we can now offer them to you gluten-free. This will also apply to subsequent versions.
For an independent analysis of our product, we authorized the Intertek Institute in Bremen, which has many years’ experience as an international company in the field of food analysis. Intertek will be making inspection analyses at regular intervals, the results of which we will provide to you in our FAQ.

We have decided against advertising with the trademarked AOECS Seal, and against applying for AOECS certification. The costs of certification with world-wide distribution would have resulted in our having to raise our prices. That seems imprudent to us at this time, and we hope to win our customers’ trust through the regular release of the independent analysis results.

This analysis is accredited according to DIN EN ISO/IEC 17025.
als PDF Dokument INTERTEK Analysis Gluten from 11/04/2015

Bon appetit!

We are the world’s sole provider of gluten-free nutrition shake powders which are tested independently for gluten.

Get in touch with us!

Please use the contact form for questions about BERTRAND or write an e-mail to hey@bertrand.bio
You will find all points of contact on the Meet the Team page.
Many questions were already answered in the FAQ-section.