What natural oils work well with Retinol

Formulating

What natural oils work well with Retinol

Posted by Dtdang on January 27, 2022 at 5:27 pm

Retinol is stable from pH={4.5, 8}.
I like hempseed oil, but its pH=4
pH of rosehip seed oil =4.5

what natural oils with pH > 4.5 and high in linoleic acid, and others that are good for skin? Thanks a lot.

Dtdang replied 2 years, 10 months ago 7 Members · 10 Replies
10 Replies

Paprik

Member
January 27, 2022 at 5:54 pm

How did you measure pH of an oil? pH for oils is irrelevant.

You adjust pH of the formula once you manufactured it. The formula must contain water, otherwise, again, it’s irrelevant.
Dtdang

Member
January 27, 2022 at 7:03 pm

Paprik! I use pH meter to measure the pH of hempseed oil directly after calibrate pH meter.
Retinol is soluble in oils and it takes about 25 minutes to soluble in oils. The final pH of oil phase is 4.0. After oil & water phase are emulsified, pH of the cream is 5.0.
My question: during 25 minutes retinol is in the pH of 4.00, retinol is still good or bad ? because it is stable with pH = {4.5, 8}

Thank Paprik.
Microformulation

Member
January 27, 2022 at 7:08 pm

If your retinol is only in oil (anhydrous), you wouldn’t get an accurate pH.
Graillotion

Member
January 27, 2022 at 7:32 pm

Dtdang said:

Paprik! I use pH meter to measure the pH of hempseed oil directly after calibrate pH meter.
Retinol is soluble in oils and it takes about 25 minutes to soluble in oils. The final pH of oil phase is 4.0. After oil & water phase are emulsified, pH of the cream is 5.0.
My question: during 25 minutes retinol is in the pH of 4.00, retinol is still good or bad ? because it is stable with pH = {4.5, 8}

Thank Paprik.

Your pH meter does not have an option…to NOT give a reading…. So it just spits something out.

Just wave it around in the air….and you’ll get the pH of air.
Paprik

Member
January 27, 2022 at 7:38 pm

Again, you cannot measure pH of an oil. The reading is not correct.

It seems like you are using it in a cream (emulsion = contains water).
Adjust the final pH of the formula.
Let it cool below 40°C, add your preservative, vitamin A and heat sensitive ingredients, mix and check and adjust the pH to 6 - 7. No problems at all Happy formulating.
Dtdang

Member
January 27, 2022 at 10:39 pm

thank you @Paprik, @Microformulation, @Graillotion
Abdullah

Member
January 28, 2022 at 11:07 am

Retinol oxidizes easily and these oils too. Use something that doesn’t oxidize like CCT, squalane or mineral oil.
ngarayeva001

Member
January 28, 2022 at 6:40 pm

And don’t forget to add BHT and BHA
Rockstargirl

Member
January 29, 2022 at 2:18 am

Dtdang said:

thank you @Paprik, @Microformulation, @Graillotion

Everyone is just saying the power of hydrogen (pH) is a water measurement. Oil/skin/concrete..technically has no pH. You need water to measure pH
Dtdang

Member
January 29, 2022 at 6:42 am

Thanks @Abdullah, @Rockstargirl, @ngarayeva001