While lemon juice can lighten hair slightly due to its acidic properties, it's not powerful enough to significantly change the color of grey hair. The change, if any, would be very subtle and temporary.
Here's why lemon juice won't work:
* It lacks the pigments needed for a color change: Lemon juice is colorless and doesn't contain the pigments necessary to deposit color onto hair.
* It's not a strong enough bleaching agent: While the acid in lemon juice can strip away some of the hair's natural color, it's not strong enough to bleach grey hair to blonde.
* It can damage your hair: Applying lemon juice to hair can lead to dryness, breakage, and irritation. The acidity can strip away natural oils and weaken the hair shaft.
If you're looking to dye your grey hair blonde, it's best to consult a professional stylist who can use safe and effective hair dye products.