Other than oil, lye and scent, every single thing added to a natural soap is being well thought of and well calculated in order to add extra values to the soap. Additives may be natural materials or synthetic substances. It is a common misunderstanding that man-made molecules are not as good as its natural version. Compared to the inconsistency of each harvest of natural ingredients, such as essential oils, their synthetic form are in fact more stable and reliable as they are made in a controlled and documented way and all assessed safe for cosmetic use according to EU regulations.
| Additive | Origin | In | What is it for? |
| Beer | Belgium | all | Skin conditioning |
| Vit E | EU | all | Anti-oxidant of superfat |
| Hops | Belgium, USA, Czech | Essentials E | Skin soothing, exfoliant, hair conditioning, antimicrobial, antiperspirant, skin protecting, masking |
| Illite (clay) | France | Fruitas | Dirts extraction. Natural colorants. |
| Café | various | Sudoras Day | Anti-age and anti-oxidant. It is believed that coffee can kill unpleasant odeur. Natural colorant. |
| Bamboo charcoal | China | Sudoras Night | Dirts extraction. Natural colorant. |
| Mica | China | Fruitas | Natural Silicate mineral as colorant |
See also article on Essential oils. 
