Anyone who wants softer, shinier hair with less frizz and more slip, without a heavy or greasy finish. AG recommends The Oil for medium to thick hair, where it won't weigh strands down, and says it will not discolour blonde hair, so it also suits lightened and colour-treated hair.

It's a retail finishing product for everyday home use; no technique or professional application is needed.

The Oil is a small, concentrated smoothing finish rather than a heavy treatment oil. Its silicone base spreads a thin, slippery film over the hair surface, and the organic Moroccan argan oil adds softness, so frizz calms down and hair reflects more light without looking greasy. Because it can be used on damp hair to help with styling or on dry hair to tame flyaways and polish the ends, one bottle covers both jobs, and the 1 oz pump size is easy to keep in a bag for touch-ups.

• Pump a small amount into your palms and rub them together.
• Apply to damp hair, focusing on mid-lengths and ends, then style as usual.
• Or smooth a little over dry hair to tame frizz and add shine.
• Use a separate heat protectant before blow-drying or flat ironing; The Oil doesn't protect from heat.

Pros:

• Very little product is needed per use, so a 30 ml bottle lasts
• Adds shine and softness without a greasy or sticky feel
• Works on damp hair before styling or on dry hair as a finisher
• AG states it won't discolour blonde hair

Cons:

• Silicone-based, so it isn't a fit for silicone-free routines
• No heat protection; a separate heat protectant is needed before hot tools
• Contains fragrance, which may not suit fragrance-sensitive users
• Best suited to medium and thick hair; very fine hair may need only a trace