Introduction
Alum, commonly known as Phitkari in India, is a natural astringent mineral compound with centuries-old applications in medicine, personal care, and water purification. With rising interest in traditional remedies and clean ingredients, many are asking:
- What is alum made of?
- Is alum good for skin?
- Can it be used daily?
This blog provides a complete, research-backed overview of alum—its types, uses, benefits, and potential side effects—so you can make informed choices.
What is Alum?
Alum refers to a class of chemical compounds that are hydrated double sulfates of aluminum. The most commonly used form in households and Ayurvedic practices is potassium alum (KAl(SO₄)₂·12H₂O), a naturally occurring salt-like crystal.
Key Characteristics:
- Colorless or white crystal
- Slightly acidic taste
- Soluble in water
- Astringent, antimicrobial, and drying in nature
Top Benefits of Using Alum
1. Natural Astringent for Skin
Alum tightens skin tissues and helps reduce enlarged pores. It’s traditionally used as:
- A post-shave treatment
- An acne-fighting toner
- A remedy for oily skin
2. Deodorizing Properties
Alum has antibacterial properties that help combat body odor. Unlike synthetic deodorants, it doesn’t block sweat glands but neutralizes odor-causing bacteria.
3. Oral & Dental Care
Commonly used in:
- Mouth ulcers (as a salt-water gargle or paste)
- Bleeding gums (mixed with a pinch of turmeric or salt)
- Toothache relief (due to its antimicrobial effect)
4. Water Purification
Alum is widely used in rural and urban areas to clarify drinking water by helping suspended particles settle. It acts as a coagulant, making water visibly clear.
5. Wound Healing & Aftershave Care
The styptic action of alum helps stop minor bleeding. Its cooling and tightening effects make it a go-to natural aftershave crystal.
6. Hair Removal & Ingrown Hair Relief
Alum powder is mixed with rose water and used as a post-hair removal treatment to:
- Soothe skin
- Prevent bumps
- Inhibit hair regrowth (anecdotal)
Common Uses of Alum
| Use Case | Form Used | How to Apply |
|---|---|---|
| Aftershave | Alum block | Rub directly on damp skin after shaving |
| Acne & Pores | Powder or block | Mix with water/rose water, apply as a toner |
| Mouth Ulcers | Powder | Dab a small amount or gargle with solution |
| Deodorant Alternative | Block | Apply to wet underarms |
| Water Purification | Powder/Block | Stir into water, allow particles to settle |
| Foot Odor & Fungal Issues | Soak (solution) | Add to warm water for a 10–15 min soak |
Are There Any Side Effects of Alum?
Yes—like any natural remedy, alum must be used with care. Overuse or improper application can lead to side effects:
✅ Common Side Effects:
- Skin dryness or irritation
- Burning sensation on sensitive skin
- Bitter taste if overused in oral care
- Stinging when applied to open wounds
❗ When to Avoid:
- Not recommended for daily long-term use on sensitive skin
- Avoid ingesting alum powder unless under medical supervision
- Not safe for internal medicinal use in large doses
Ayurvedic Insight
In Ayurveda, alum (Phitkari) is classified as:
- Ruksha (drying) and Laghu (light)
- Helps balance Kapha and Pitta, but can aggravate Vata if overused
- Typically combined with rose water or ghee to balance its effects
Expert Opinion
Yuvaan Kumar, Ayurvedic Researcher at Herb and Spices, shares:
“Alum is a timeless remedy that blends modern utility with ancient wisdom. Its astringent and antibacterial properties make it especially useful for skincare and hygiene. However, it’s important to remember that alum is not a cure-all—it should be used sparingly and preferably in natural formulations, not in raw form for extended periods.”
FAQs
Q1. Can I use alum on my face every day?
Not recommended. It can dry out the skin or disturb the natural barrier. Limit usage to 2–3 times a week.
Q2. Is alum safe for children?
Avoid topical use on children unless advised by a doctor due to its strong astringent effect.
Q3. How do I use alum for water purification?
Add a pinch of alum powder to 1–2 liters of water, stir, and allow it to sit for 30 minutes. Sediment will settle at the bottom.
Q4. Does alum help with bad breath?
Yes, you can gargle with a diluted alum solution, but don’t swallow it.
Q5. Can alum block sweat glands like deodorants?
No. Alum neutralizes bacteria but does not block pores—making it a safer, more natural alternative.
Conclusion
Alum is a powerful, multi-purpose natural mineral that offers several skincare, hygiene, and health benefits. From acne care to odor control and even water purification—this humble crystal proves its worth across diverse applications.
However, moderation and informed use are essential. Choose high-quality, naturally sourced alum and consult an Ayurvedic or medical expert if you have sensitive skin or existing conditions.