Understanding DMAE Concentration in Toner Formulas

You've asked for clarification on the concentration of DMAE in the example toner formula, specifically why it's listed as 4% DMAE when using 10-20% of DMAE (SkinTight MD™) Liquid, which is a 50% concentration product.

The key to understanding this lies in the form of DMAE used and its conversion to pure DMAE concentration.

DMAE (SkinTight MD™) Liquid is supplied as Dimethylaminoethanol Tartrate at a 50% concentration. However, the active component is the Pure DMAE. According to the information provided, 100% DMAE Tartrate is equivalent to 40% Pure DMAE.

Therefore, the DMAE (SkinTight MD™) Liquid, which is 50% DMAE Tartrate, contains:
50% Tartrate * 40% Pure DMAE / 100% Tartrate = 20% Pure DMAE

So, DMAE (SkinTight MD™) Liquid is effectively a 20% concentration of Pure DMAE.

Now let's look at the example formula:

• Purified Water: 80-90%
• DMAE (SkinTight MD™) Liquid: 10-20%
• Preservative: 0.5%

If you use 10% of DMAE (SkinTight MD™) Liquid in the formula, the concentration of Pure DMAE will be:
10% (Liquid) * 20% (Pure DMAE in Liquid) = 2% Pure DMAE

If you use 20% of DMAE (SkinTight MD™) Liquid in the formula, the concentration of Pure DMAE will be:
20% (Liquid) * 20% (Pure DMAE in Liquid) = 4% Pure DMAE

The example formula title "Toner DMAE 4%" refers to the concentration of Pure DMAE achieved when using the higher end of the recommended range for DMAE (SkinTight MD™) Liquid (20%).

Regarding your understanding that using 10% of the liquid would give 5% concentration: This is incorrect. As shown above, using 10% of the liquid (which is 20% Pure DMAE) results in 2% Pure DMAE in the final formula.

To achieve a 5% concentration of Pure DMAE in your final formula, you would need to calculate the required percentage of DMAE (SkinTight MD™) Liquid (20% Pure DMAE):
Desired Pure DMAE Concentration / Concentration of Pure DMAE in Liquid = Percentage of Liquid Needed
5% / 20% = 0.25 or 25%

So, you would need to use 25% of DMAE (SkinTight MD™) Liquid to get a 5% concentration of Pure DMAE in your formula. However, please note that the recommended usage rate for DMAE (SkinTight MD™) Liquid is 1-10%, with use above 5% potentially causing skin irritation. Achieving 5% Pure DMAE requires using 25% of the liquid, which is significantly above the recommended maximum usage rate and would likely cause irritation.

It is generally recommended to use DMAE at lower concentrations, typically 0.5-1.0% Pure DMAE, as higher concentrations can lead to irritation. The example formula provides a range (10-20% liquid, resulting in 2-4% Pure DMAE) but also highlights the potential for irritation at higher levels.