Hi Mihaela, Each ingredient and/or synergy of ingredients has a specific role in achieving the desired effect. In theory, all the suggested substitutions can be made, and instead of using lemon essential oil to help with brittle and soft nails, you can use another essential oil or natural fragrance to scent the serum.

Hello, can I replace borago oil with jojoba oil?Rosemary extract with vit E?(in what quantity?Lemon essential oil, what role does it have in the recipe?I am interested in perfuming the oil, with what product can I do this?Thank you!

Hello! Vegetable keratin is a water-soluble ingredient, it cannot be incorporated into an oily composition. All the best!

Can keratin be included? How many drops? Thank you

Hello. You can add almond oil, replacing some of the castor or borago oil, as preferred. Propolis cannot be added to this formula.

Hello, can you add sweet almond oil and propolis? If so, in what percentage? Thanks

Hello, Madalina. Yes, you can make the suggested substitutions, from vitamin E put 2 drops.

Hello. Is it ok if I replace borago oil with vegetable silicone and rosemary extract with vitamin E ?

Add 2 pic. of vitamin E, if available.

If I don't add the antioxidant rosemary has something I forgot to order.

Lime essential oil is an important ingredient in this formula; you can use another nail-strengthening essential oil instead.

Hello. I want to replace the recommended oil with marigold oil, to put vitamin E. The question is if I can put green tea essential oil instead of green lemon. Thank you very much! I'm really looking forward to prepare the recipe.

Can green lemon essential oil be replaced with lemongrass? Thank you

Hello, You can use vitamin e.

Hello, With what other ingredient could I replace the antioxidant extract of rosemary? Thanks Gabriela

Elemental, Thank you!

Luiza, You can use lemon (Citrus limonum) essential oil instead of lime (Citrus aurantifolia) oil. Borage oil is a moderately oxidative oil, so an antioxidant is needed. If you want to remove both vitamin E and rosemary extract from the formula, then you will need to replace the borage oil with another oxidation-resistant vegetable oil.

Can I remove vit E?Thank you very much!

Instead of green lemon can I use yellow lemon and eliminate vit E? Thank you very much!

Can I eliminate rosemary extract or vitamin E? And can I use yellow lemon instead of green lemon? Thank you!