People with dry, fragile or frizzy lengths, particularly lightened or highlighted blonde hair, and anyone whose scalp feels dry or tight. Oligo states it suits all hair types and colours.

A retail product for home use: a styling and finishing oil for the lengths and an occasional pre-shampoo scalp treatment.

Most hair oils only treat the lengths, and most scalp treatments are a separate product. This one handles both: a few drops smooth frizz, soften rough ends and add shine to lightened hair, and the same bottle works as a 20-minute pre-wash treatment that soothes a dry, tight scalp. It carries the same ceramide and plant-protein complex as the rest of the Blacklight REP range, so it fits straight into a repair routine.

For hair:

• Dispense a small amount into your palms.
• Apply from mid-lengths to ends on damp or dry hair.
• Style as desired.

For dry scalp relief:

• Dampen the scalp with lukewarm water.
• Using your fingertips, apply a generous amount of oil directly to the scalp, avoiding the lengths and ends.
• Massage gently in circular motions and leave on for 20 minutes.
• Cleanse with Blacklight Repair Shampoo and rinse thoroughly.
• Follow with Blacklight Repair Conditioner on hair and scalp, rinse and style as usual.

Pros:

• Two uses in one bottle: finishing oil for the lengths and a pre-wash dry-scalp treatment
• Lightweight and fast-absorbing according to the brand, so it suits finer hair better than heavy oils
• Smooths frizz and split ends and adds shine

Cons:

• Small 45 ml bottle, and the scalp treatment uses a generous amount
• Scalp treatment needs 20 minutes plus a full wash
• Fragranced, so not ideal on a sensitive or reactive scalp