这个使用浓度到底是多少呀？
这个是garden of wisdom copy 来的：


INCI: Sodium Hyaluronate

Suggested Usage Rate: up to 2%

Solubility: water

这个是the personal formulator上的:
Sodium Hyaluronate

Also Called Hyaluronic Acid

INCI: Sodium Hyaluronate

Sodium
Hyaluronate is the sodium salt of Hyaluronic Acid. It is a biopolymer
produced by fermentation. It is supplied as a 1% water solution. Due to
its natural skin-like properties, excellent water retentive capacity
and high viscoelacticity, it is highly recommended for skin products,
such as creams, lotions, sprays, lipsticks, etc. The recommended usage
for skin care products is 0.25% to 2%

To a 4oz cream for 2% use level, add 2.27g or 1/2 tsp

To a 1 gallon cream base for 2% addition, add 75.57g or 1/3 cup.

可是我记得猪猪原来配的是0.1%的水水呀？

按照牛尔的说法，最终使用浓度是0.1~0.2%。