
B-SILK™ PROTEIN by Bolt Threads is an unprecedented vegan, biodegradable silk polypeptide that delivers a multitude of benefits to skin and hair while alleviating the need for linear silicones, silicone elastomers and keratin in formulations. It provides anti-aging effects by attenuating the negative impacts of pollution, blue light and UV. It provides multifaceted functionality to formulations in that it acts as a defensive film-former, texturizer and viscosity enhancer while also delivering a unique cushioning sensation and lightweight long-lasting wear. It reduces greasiness and tackiness in sunscreens and color cosmetics and provides weightless volume to hair and lashes. B-SILK™ PROTEIN is stable, microbiome-friendly, bio-based, plastic-free, cruelty-free, has neutral odor and color and is easily incorporated into a variety of formulation types.
The results are evaluated with grades from 1 (one) to 3 (three).
If the product shows no or positive influence to the above-mentioned aspects, a grade of 1 is awarded respectively.
If only a very weak negative influence can be detected in the tests, the grade 2 is awarded and in case of a clearly negative influence, the product receives the grade 3.
The product has passed up to grade 2.0.
MyMicrobiome Standard 18.10 - Leave on
Test |
Grade |
Balance of the skin microbiome |
1.0 |
Diversity of the corresponding skin microbiome (sebaceous, x2) |
2.3 |
Diversity of the corresponding skin microbiome (dry, x2) |
2.3 |
Skin-product contact direct (sebaceous, x2) |
1.9 |
Skin-product contact direct (dry, x2) |
1.5 |
Skin-product contact indirect (sebaceous) |
1.7 |
Skin-product contact indirect (dry) |
1.3 |
Overall grade |
1.8 |
MyMicrobiome Standard 18.10 - Rinse off
Test |
Grade |
Balance of the skin microbiome |
2.0 |
Diversity of the corresponding skin microbiome (sebaceous, x2) |
1.1 |
Diversity of the corresponding skin microbiome (dry, x2) |
1.2 |
Skin-product contact direct (sebaceous, x2) |
1.9 |
Skin-product contact direct (dry, x2) |
1.5 |
Skin-product contact indirect (sebaceous) |
1.7 |
Skin-product contact indirect (dry) |
1.3 |
Overall grade |
1.5 |
MyMicrobiome Standard 19.10 - Leave on
Test |
Grade |
Balance of the scalp microbiome |
1.0 |
Diversity of the corresponding scalp microbiome (x2) |
2.5 |
Scalp-product contact direct ( x2) |
1.5 |
Scalp-product contact indirect |
1.3 |
Overall grade |
1.7 |
MyMicrobiome Standard 19.10 - Rinse off
Test |
Grade |
Balance of the scalp microbiome |
2.0 |
Diversity of the corresponding scalp microbiome (x2) |
1.3 |
Scalp-product contact direct ( x2) |
1.5 |
Scalp-product contact indirect |
1.5 |
Overall grade |
1.5 |
MyMicrobiome Standard 21.10 - Leave on
Test |
Grade |
Balance of the skin microbiome |
1.0 |
Diversity of the corresponding skin microbiome (x2) |
1.0 |
Skin-product contact direct (x2) |
2.7 |
Skin-product contact indirect |
1.0 |
Overall grade |
1.6 |
MyMicrobiome Standard 21.10 - Rinse off
Test |
Grade |
Balance of the skin microbiome |
1.0 |
Diversity of the corresponding skin microbiome (x2) |
1.3 |
Skin-product contact direct (x2) |
2.7 |
Skin-product contact indirect |
1.0 |
Overall grade |
1.7 |
The MyMicrobiome Standard evaluates cosmetic and personal care products, that encounter the skin or mucous membrane, in terms of their influence on the microbiome located at a specific body site.
An intact skin microbiome has a fundamental influence on skin health. Products which are to be skin-friendly must also be Microbiome-friendly in order not to unbalance the skin of the user.
The MyMicrobiome Standard evaluates the influence of cosmetic and personal care products on the microbial key players of a specific skin or mucous membrane area. The human microbiome is very individual from person to person.
Each area, however, harbors a characteristic composition of bacteria, viruses and fungi. The test examines the products influence on the key organisms typical for each skin area and thus offers a standardized procedure.
Here you can find an overview of our testing standards: MyMicrobiome Standard
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