ALPHA HYDROXY ACIDS; AHA (peeling, moisturizers)

**Alpha Hydroxy Acids (AHAs)** are a group of **water-soluble exfoliants** derived from **fruits, milk, and sugar**. They are widely used in cosmetics for **skin renewal, brightening, and anti-aging** effects.

### 🌿 **Key Benefits**:
– **Exfoliation & Cell Turnover**: AHAs **dissolve dead skin cells**, revealing a smoother complexion.
– **Hydration Boost**: Unlike harsh scrubs, AHAs **increase moisture retention** while exfoliating.
– **Hyperpigmentation Reduction**: Helps **fade dark spots, acne scars, and uneven skin tone**.
– **Collagen Stimulation**: Encourages **firmer, plumper skin**, reducing fine lines and wrinkles.

### 🧴 **Common AHAs & Their Uses**:
– **Glycolic Acid**: The **smallest AHA**, penetrates deeply for **intense exfoliation**.
– **Lactic Acid**: **Gentler**, ideal for **sensitive skin and hydration**.
– **Citric Acid**: **Brightens skin**, often used in **antioxidant formulations**.
– **Mandelic Acid**: **Slow-penetrating**, great for **acne-prone and darker skin tones**.

### 🛡️ **Safety & Considerations**:
– **Concentration Matters**: **5–10% AHAs** are common in daily skincare, while **20–70%** is used in professional peels.
– **Sun Sensitivity**: AHAs **increase UV sensitivity**, so **daily sunscreen is essential**.
– **pH Balance**: Lower pH enhances exfoliation but **can cause irritation**—formulations adjust accordingly.