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Posts: 1
Reply with quote  #1 
Would adding Ascorbic Acid to my own simple HA serum be beneficial, or should I keep these ingredients separate and let each work its magic in its own time? I have been using HA serum but would like to start adding the vitamin C. I would love to save time and mix them if possible to one serum but if this would degrade them, I will keep them separate. I see different recipes online but only trust those coming from this site... would appreciate a good advice here please. Thank you!

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Posts: 15,983
Reply with quote  #2 
As long as you add enough water to dissolve both the hyaluronic acid and the ascorbic acid you should be OK. Don't forget the preservative or, if you don't use it, keep refrigerated and use within 3-4 days.

Posts: 13
Reply with quote  #3 
I find that making small batches in an airless opaque  container helps to keep it from oxidizing too quickly.

Posts: 34
Reply with quote  #4 
I make a (approximately 15%) vitamin c serum that I have been enjoying for over a year now--and trust me, I am no DIYer. It was based originally on suggestions from Dr. Hannah and tweaked by myself over time.

I use:
5 tsp of Thayers rose water toner (I've tried water and rosewater, but this product helps to dissolve the ferulic acid better then either. There is also phenoexynol as a preservative--I believe this may also be what is helping dissolve the FA. Its also simple enough that I don't have to worry about any interactions between ingredients, although if anyone could think of a sub, I would be very happy to hear it!).
1 tsp ascorbic acid
1/4 tsp ferulic acid
1 tsp sea kelp coral

I blend those together, then test for pH using strips. I add pinches of baking soda until I achieve a pH between 2 and 3.

I store it in the fridge in a dark glass vitamin bottle I reused. 

This lasts me about 3 uses (I use it all over my body)--I use it every other night. Before I wash my face, I separate what I'm going to use and then I add a sprinkle of Hyaluronic acid powder to that. I shake it up and let the hyaluronic absorb the liquid until I'm ready to use it. Then I shake it again.

I never see signs of oxidation, and I don't have to worry about preserving the HA (I remember reading on the SAS website that HA can't be preserved more than a couple of days)

Everything except the Thayers and pH strips and baking soda are from the SAS website

I welcome any feedback, but like I said, it took a while for me to get this down and its been working great for me! It takes two seconds for me to add the HA and shake. 


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Posts: 15,983
Reply with quote  #5 
Thayers rose water toner:
Ingredients: Purified water, aloe barbadensis leaf juice, glycerin, fragrance, hamamelis virginiana extract, rosa centifolia (rose) flower water, citric acid,  grapefruit seed extract.

It bothers me, a lot, that Thayers is using a fake natural preservative, which has been shown to contain chemical derivatives that are, at least, iffy.

Thayers would go into my list of ugly companies, that use adjectives like "natural" to sell fake preservative-free products. Also, please note that the rose aroma comes not from the rose water but from the fragrance.


Pharmazie. 1999 Jun;54(6):452-6.

Aspects of the antimicrobial efficacy of grapefruit seed extract and its relation to preservative substances contained.

The antimicrobial efficacy as well as the content of preservative agents of six commercially available grapefruit seed extracts were examined. Five of the six extracts showed a high growth inhibiting activity against the test germs Bacillus subtilis SBUG 14, Micrococcus flavus SBUG 16, Staphylococcus aureus SBUG 11, Serratia marcescens SBUG 9, Escherichia coli SBUG 17, Proteus mirabilis SBUG 47, and Candida maltosa SBUG 700. In all of the antimicrobial active grapefruit seed extracts, the preservative benzethonium chloride was detected by thin layer chromatography. Additionally, three extracts contained the preserving substances triclosan and methyl paraben. In only one of the grapefruit seed extracts tested no preservative agent was found. However, with this extract as well as with several self-made extracts from seed and juiceless pulp of grapefruits (Citrus paradisi) no antimicrobial activity could be detected (standard serial broth dilution assay, agar diffusion test). Thus, it is concluded that the potent as well as nearly universal antimicrobial activity being attributed to grapefruit seed extract is merely due to the synthetic preservative agents contained within. Natural products with antimicrobial activity do not appear to be present.

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