Doma pripravljen serum - vit. C + E

Info to make your own serum

General Recipe :

You can mix this recipe up two ways using propylene glycol or using just water. If you can use the propylene glycol it is better as it preserves the freshness of the AA. It also helps in the penetration of AA into the deeper layers of your skin.

With Propylene Glycol

L-ascorbic acid ( tspns)*	Water ( tspns)	Propylene Glycol ( tspns)	concentration (weight/volume)
1/2	3 tsp	1 tsp	10%
1/2	a bit more than 1.5 tsp	a bit less than 1/2 tsp	20%

With Water

L-ascorbic acid ( tspns)*	Water ( tspns)	concentration (weight/volume)
1/2	4 tsp	10%
1/2	2 tsp	20%

* Please note the above numbers are for AA that reads 1/4 teaspoon is 1125 mg (1.125 g). Check carefully on your bottle of vitamin c to see the number of g in a serving size. The formula is based on the idea that 2g AA in 10 ml solvent = 20% solution. You may need to figure out how many tspns of AA = 2g. For example If your ascorbic acid reads 1/4 teaspoon is 1250 mg (1.250 g), then you need to add .4 of a tsp to equal 2 g. For pharmaceutical grade AA 1/4 tsp. = 2.065g

Storage

Store your serum in a tinted bottle. Many use a dark blue or amber dropper bottle. I use a tinted spray bottle.

The solution with propylene glycol keeps for 1 week

The solution with water keeps for 24 hours.

Adding vitamin E

Using Ascorbic acid in conjunction with 1% alpha-tocopherol (Vitamin E) had a greater antioxidant effect than either used alone. So you can add 1% tocopherol to your serum, but it is not water-soluble, so you may need an emulsifier like polysorbate 20. We do not know how much.

Adding Baking Soda

The concentration of homemade serum is about ph 2. It would be optimal to raise the ph to 3.2. This can be done by adding baking soda. We do not currently know how much. I am however in the process of trying to determine this. If you find the serum too irritating, you can add some baking soda on your own. Let me know how much you add and what effect you see.