Tannic acid is a type of tannin, a plant-based compound known for its astringent properties.  While tannins are a broader group, tannic acid is a specific form that’s often extracted and used in various health, skincare, and even industrial products.

Tannic acid contains high levels of polyphenols, which are compounds known to fight oxidative stress in the body. Or simply, it helps to fight free radical damage, those pesky unstable molecules that can lead to ageing, inflammation, and chronic disease. According to a 2022 study, TA has demonstrated properties that can decrease inflammation by acting as an antioxidant, function as an antibiotic against common pathogenic bacteria, and trigger apoptosis in various types of cancer.

Tannic acid is valued in skincare for its astringent properties. It minimises pores, reduces excess sebum, and calms redness, which is why it is a popular ingredient used in toners, acne creams, and soothing moisturisers. It might also reduce redness and swelling due to its vasoconstrictive properties.

Historically, tannic acid has been used to soothe the digestive tract. Some herbal remedies use it to help with diarrhoea or mild gastrointestinal inflammation, thanks to its ability to “tighten” tissues and reduce irritation. However, this should be done under medical guidance.

Tannic acid may have antimicrobial properties, which help inhibit the growth of certain bacteria, viruses, and fungi.  This makes it a potential component of natural mouthwashes or even dressings for wounds.

Despite all the positives, tannic acid isn’t a one-size-fits-all miracle. Too much of I, especially when consumed can cause trouble.

One of the most talked-about drawbacks is its effect on iron absorption. Tannic acid can bind to iron in the digestive system and make it harder for your body to absorb, especially if you are relying heavily on plant-based sources of iron. This could lead to iron deficiency over time, especially in people with anaemia.

Tannic acid may lead to nausea or stomach discomfort in some individuals when taken in high doses or on an empty stomach. It is always wise to begin with a small dose and observe how your body responds.

While it's great for acne and oily skin, tannic acid can be too drying or irritating for some, particularly those with very dry or sensitive skin. Hence, always patch test before attempting a new product.

Look for serums, creams, or toners that list tannic acid as a key ingredient, usually at a low concentration. Apply it once a day, preferably in the evening, and then use a hydrating moisturiser to balance any dryness.

You should take tannic acid supplements only when prescribed or suggested by a healthcare professional. Short-term use is suitable for treating certain digestive disorders, but self-administration is not recommended.

You’re already getting small amounts of tannic acid from foods like tea, coffee, grapes, apples, and red wine. That’s generally safe for most people and can even be beneficial when part of a balanced diet.

Tannic acid is one of those naturally occurring compounds that offer a lot when used wisely. It has real potential in skincare and natural medicine, but like most powerful ingredients, it’s all about balance. Listen to your body, don't overdo it, and when unsure, consult your dermatologist or nutritionist.

[ This article contains information for informational purposes only. Hence, we advise you to consult your professional if you are dealing with any health issue to avoid complications.]