Citrus Fruits are one of the most loved fruits for DIY because they lend freshness and cleanse the skin really well. But, they are also very harsh on the skin because of their acidity so one should use them in moderation and also, they make the skin photosensitive.
So, why should we really bother ourselves with these fruits? Well, because not all citrus fruits have the same level of acidity. Some are gentler on skin and can be used by sensitive skins as well. pH level is the measure of acidity of the fruit. Any chemical is either acidic or alkaline in nature and generally, fruits are acidic.
Some are alkaline as well. But, right now, we are talking about citrus fruits and they are acidic so let us look at the pH values of some widely available fruits to know which can be used safely on skin and which should be avoided. Though, lemon is the most loved citrus fruit.
Most Acidic Fruits
Tangerine – 3.90, Grapefruit – 3.38, Lime – 2.40, Lemon – 2.30
Least Acidic Fruits
Mandarin – 11.50, Orange – 4.35, Kumquat – 3.95
Also, remember that as the fruit ages, its acidity decreases.(Source)
Now, the pH level of the skin around 5.4 so if you use orange instead of lemon, its more gentle on skin. Even I was surprised to know that mandarin is alkaline and not acidic. When I was writing this post, I was reminded that I prefer tomatoes to lemon so checked its pH value as well.
pH value of fresh tomato ranges between 4.3 and 4.9 (source). In fact, potato is also considered to be great for skin. Its pH value lies between 5 and 6.5 which is relatively very less acidic and more gentle on skin. So, you can now customize your home remedies according to the pH levels of the ingredients