## **600 mg/ml Reduced Glutathione in 1x PBS with 0.9% Benzyl Alcohol (30 ml, pH 7–7.4)**
**Ingredients:**
- Reduced Glutathione: **18.0 g**
- Benzyl Alcohol: **0.27 ml** (0.9% of 30 ml)
- 1x PBS: **18.93 ml** (see note)
- NaOH (1 N): as needed for pH
**Note:**
Glutathione powder displaces 0.6 ml/g (18 g = 10.8 ml displacement).
PBS volume = 30 ml − 10.8 ml (glutathione) − 0.27 ml (BA) = **18.93 ml**
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### **Steps:**
1. **Add** 18.0 g glutathione powder to a beaker.
2. **Add** 0.27 ml benzyl alcohol.
3. **Add** ~18 ml 1x PBS (reserve the rest for final adjustment).
4. **Stir** to dissolve.
5. **Adjust pH** to 7.0–7.4 with NaOH (add dropwise).
6. **Transfer** to a 30 ml volumetric flask or cylinder.
7. **Top up** to 30 ml with remaining PBS.
8. **Mix well** and aliquot as needed.
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**Storage:**
Refrigerate (2–8 °C), protect from light/air.
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*Yields 30 ml of 600 mg/ml glutathione in 1x PBS, 0.9% BA, pH 7–7.4.*
Looks quite easy

gonna try it soon as I get the glutathione powder!