Keratin vs. Biotin – Which Works Better for Hair Growth?

When it comes to achieving thick, healthy, and shiny hair, keratin and biotin are two of the most talked-about ingredients. You’ve probably seen them listed on the labels of shampoos, conditioners, and supplements. But what exactly do they do, and which one is better for hair growth?

Let’s break it down in simple terms so you can decide what’s right for your hair.

What Is Keratin?

Keratin is a type of protein that naturally makes up your hair, skin, and nails. Think of it as the building block of your hair. Over time, heat styling, chemical treatments, and pollution can damage keratin, leading to frizz, breakage, and dullness.

Benefits of Keratin for Hair:

• Strengthens hair strands to reduce breakage.

• Smooths the cuticle, making hair look shinier and softer.

• Reduces frizz and improves manageability.

How You Use It:

• Keratin treatments in salons (like Brazilian blowouts).

• Keratin-infused shampoos, masks, and conditioners.

Important Note: Keratin mainly repairs and strengthens your existing hair rather than directly stimulating new hair growth.

What Is Biotin?

Biotin, also known as Vitamin B7, is a water-soluble vitamin that helps convert nutrients into energy. It plays a key role in keeping your hair, skin, and nails healthy.

Benefits of Biotin for Hair:

• Supports production of keratin in the body.

• May help reduce hair thinning.

• Can improve overall hair health when taken regularly.

How You Use It:

• Oral supplements (capsules, gummies).

• Biotin-fortified hair products.

Important Note: Biotin deficiencies are rare, but if you are low on biotin, supplementing can promote stronger hair growth.

Keratin vs. Biotin – Which Is Better for Hair Growth?

Short Answer:
Both keratin and biotin are helpful, but they work in different ways.

✅ Keratin is excellent for strengthening and repairing your hair externally. It can make your hair look healthier and prevent breakage, which helps you retain your length.

✅ Biotin works from the inside out. If you have biotin deficiency, taking supplements can encourage new growth and reduce hair fall.

If your goal is faster hair growth, biotin may be more effective—especially if your hair loss is related to a vitamin deficiency.
If you want to repair damaged hair, reduce frizz, and improve shine, keratin is your go-to.

For the best results, many people use both: a biotin supplement along with keratin hair treatments.

FAQs

1. Can I take biotin and use keratin products together?

Yes! Combining both can help you strengthen hair from the inside and outside.

2. How long does it take to see results with biotin?

It usually takes about 3–6 months of daily use to notice visible improvements in hair growth.

3. Are there any side effects of biotin?

Biotin is generally safe, but high doses may interfere with lab tests. Always check with your doctor before starting any supplement.

4. Does keratin treatment damage hair?

Some salon keratin treatments use chemicals like formaldehyde, which can weaken hair over time if overused. Choose formaldehyde-free formulas and avoid frequent treatments.

5. Which is better for thinning hair?

If your hair is thinning, biotin is often more effective for addressing the root cause (nutrient deficiency). Keratin will help make the hair you already have stronger and smoother.

6. Can I get biotin from food?

Yes! Eggs, nuts, seeds, salmon, and sweet potatoes are all good sources of natural biotin.

Final Thoughts

Keratin and biotin both have a place in a healthy hair routine.

• For stronger, smoother hair: Keratin treatments and products.

• For supporting new growth: Biotin-rich diet or supplements.

If you’re unsure which one you need, consider consulting with a dermatologist or trichologist to understand what’s best for your hair goals.