While glutathione is a powerful antioxidant that offers numerous benefits for the skin, it is challenging to create a stable and effective glutathione cream at home due to the compound's inherent instability. However, you can incorporate ingredients that promote glutathione production and support skin health. Here's a recipe for a homemade cream that can help boost glutathione levels in the skin:

Ingredients:
- 1 tablespoon shea butter
- 1 tablespoon coconut oil
- 1 teaspoon vitamin E oil
- 1 teaspoon rosehip seed oil
- 1 teaspoon niacinamide (vitamin B3)
- 1 teaspoon alpha-lipoic acid
- 5 drops of frankincense essential oil (optional)

Instructions:
1. In a double boiler or a heat-safe bowl placed over a pot of simmering water, melt the shea butter and coconut oil together until fully melted and combined.
2. Remove from heat and allow the mixture to cool slightly.
3. Add the vitamin E oil, rosehip seed oil, niacinamide, and alpha-lipoic acid to the melted mixture. Stir well to combine.
4. If desired, add a few drops of frankincense essential oil for added skin benefits and a pleasant aroma.
5. Transfer the mixture to a clean, airtight jar or container.
6. Allow the cream to cool completely and solidify before use.

This homemade cream incorporates ingredients like niacinamide and alpha-lipoic acid, which can help support glutathione production in the skin. Shea butter and coconut oil provide moisturizing properties, while rosehip seed oil and vitamin E oil offer additional antioxidant benefits.

Remember, homemade skincare products may not have the same stability and efficacy as commercially produced ones. If you're looking for a glutathione cream with a higher concentration and proven stability, it's best to explore reputable skincare brands that specialize in antioxidant-rich formulations.