treatment icon
treatment

Natural Oils for Hair: Benefits and Limitations

Written by healthwords.ai's team of doctors and pharmacists based in UK | Updated: 17 Jun 2025 | 4 min read

Natural oils are popular in hair care, especially as people look for more natural beauty solutions. Two of the most popular oils are coconut oil and argan oil. People use them because they help moisturize, protect, and sometimes strengthen hair. This article explains how these oils work, their benefits and downsides, and what science says about them. The goal is to help you decide if these oils are right for your hair routine.

How oils work on hair

When you put oil on your hair, it acts as a moisturizer and a protective layer. Oils seal the hair cuticle, which helps keep moisture in—this is especially good for dry or damaged hair. Some oils, like coconut and olive oil, can go deep into the hair strand to hydrate and strengthen from the inside. Others, like argan and jojoba oil, stay mostly on the surface, making hair shiny and smooth.

Types of Oil Absorption

  • Penetrating Oils: Coconut and olive oil can go into the hair shaft to nourish and protect from the inside.
  • Surface Oils: Argan and jojoba oil mostly stay on the surface, sealing the cuticle and adding shine.

Oils can make hair look and feel healthier, but they do not actually "heal" damaged hair. Too much oil can build up, making hair greasy and blocking the scalp.

Best Practices

  • Apply oil to damp hair for better absorption.
  • Use only a small amount, especially for fine or oily hair.
  • Try coconut or olive oil as a pre-wash treatment to help reduce protein loss while shampooing.

How Oils Help Without Absorption

  • Sealant: Oils like argan and jojoba seal the hair cuticle, keeping moisture in.
  • Shine and Frizz Control: Surface oils make hair look shiny and reduce frizz.
  • Protection: Oils protect against sun, heat, and pollution, and help prevent breakage during brushing.

When Absorption Matters

Some oils, like coconut and olive oil, can get inside the hair and help with deep hydration and strengthening. Even if oils don’t absorb deeply, they can still help by keeping hair moist, shiny, and protected.

Types of hair oil

Coconut Oil for Hair

Moisturizing: Coconut oil is great for keeping hair moisturized. It contains special fatty acids that can go deep into the hair, making it softer and easier to manage.

Benefits:

  • Improves hair texture and adds shine
  • Reduces frizz
  • Helps prevent split ends
  • Reduces protein loss, especially in damaged hair

Limitations:

  • Can be too heavy for fine or oily hair, making it greasy
  • Overuse can cause buildup on the scalp

Best Uses:

  • Pre-wash treatment: Apply to dry hair before shampooing
  • Leave-in conditioner: Use a small amount on the ends of damp hair
  • Deep conditioning: Apply generously and leave overnight

Argan Oil for Hair

Nourishment and Shine: Argan oil, also called "liquid gold," is rich in vitamin E and fatty acids. It nourishes hair, restores shine, and smooths frizzy hair.

Benefits:

  • Deeply nourishes and hydrates
  • Improves hair elasticity
  • Restores shine and reduces frizz

Heat Protection: Argan oil can be used as a natural heat protectant before using styling tools.

Limitations:

  • May weigh down fine hair
  • Can make hair look greasy if overused
  • Not ideal for oily scalps

Best Uses:

  • Leave-in conditioner: Apply a small amount to damp hair
  • Styling serum: Use on dry hair to reduce frizz
  • Heat protectant: Apply before using heated styling tools

Other Natural Oils

Jojoba Oil: Mimics the scalp’s natural oil, helps balance oily or dry scalps, and is lightweight—good for oily or combination hair.

Castor Oil: Some people use it hoping to boost hair growth, but there is little scientific proof. It is thick and may not suit fine hair.

Olive Oil: Good for deep conditioning, especially for thick or curly hair, but can be too heavy for fine or oily hair.

Myths and misconceptions

Myths

  • "Oils Make Hair Grow Faster": Oils can help keep the scalp healthy, which is good for hair growth, but they don’t make hair grow faster. Genetics and hormones are more important.
  • "More Oil is Better": Using too much oil can make hair greasy and cause buildup, which can block hair growth.
  • "Oils Work for Everyone": Not all oils are right for every hair type. Fine hair may need lighter oils, while thick hair can handle heavier oils.

How to use oils in your hair care routine

Choosing the Right Oil:

  • Fine hair: Use lightweight oils like jojoba or argan
  • Thick/curly hair: Use heavier oils like coconut or olive oil
  • Oily scalp: Use balancing oils like jojoba

Application Tips:

  • Use a small amount, mainly on the ends or mid-lengths of hair
  • For deep conditioning, apply more and leave overnight
  • For scalp treatments, massage in and rinse after 30 minutes

How Often to Use:

  • Deep conditioning: Once a week
  • Styling: Use a little on the ends as needed

Conclusion

Natural oils like coconut, argan, and jojoba can help keep hair healthy, shiny, and protected. The right oil and how you use it depend on your hair type. Oils won’t make hair grow faster or fix all hair problems, but they can be a helpful part of a good hair care routine. Try different oils to see what works best for your hair, and ask a hair care expert if you’re unsure.

This article has been written by UK-based doctors and pharmacists, so some advice may not apply to US users and some suggested treatments may not be available. For more information, please see our T&Cs.