Can it be used on an oily or flaky scalp, or is it only for dry hair?

Yes. The formula includes tea tree essential oil specifically because the blend is suited to a scalp that feels oily yet flaky, not just to one that feels dry. The sunflower oil base helps spread the product, while the burdock root extract contributes conditioning lipids, and tea tree gives a fresher feel. Since this is a pre-wash oil, most of it is removed with shampoo, so it is not intended to sit on the scalp and create extra grease.

If your scalp is oily, use a smaller amount than you would on a dry scalp, massage it gently along the partings, and shampoo thoroughly afterward — often twice is needed to remove the oil residue. A shorter contact time, around 15-20 minutes, can help if you are worried about heaviness. The point is to let the oil soften the flaky buildup and make the wash feel more thorough, not to add a heavy layer.

If your scalp becomes visibly greasier or feels worse after using it, reduce frequency to once every second week or stop and rely on your regular shampoo. There is no need to force this product into a routine if it does not suit your scalp.