Tranexamic Acid Concentration and Skin Irritation for Freckle Treatment

Regarding your question about mixing Tranexamic Acid 5% and Lemon Peel 2% for freckles:

• Tranexamic Acid: Using Tranexamic Acid at 5% is too high and can be harmful and irritating to the skin. The maximum recommended concentration is typically 3%.
• Lemon Peel Bioferment: Using Lemon Peel Bioferment at 2% is acceptable and not irritating to the skin.

While you have significant freckles, using an overly high concentration of Tranexamic Acid is not advisable as it can cause skin irritation. It's best to stick to the recommended maximum concentration of 3% for Tranexamic Acid.

Information regarding whether a gel or essence base is better is not available from the provided context.