What LOC and LCO mean
Both methods describe an order for layering hair products designed to maximize moisture retention. LOC stands for Liquid, Oil, Cream. LCO stands for Liquid, Cream, Oil. The liquid provides the actual moisture (usually water or a water-based leave-in). The oil and cream seal that moisture inside the strand. The only difference between the two methods is whether the cream or oil goes on second.
Why order matters
Applying an oil before a cream means the cream sits on top of the oil barrier — which is effective for locking in moisture under a heavy final seal. Applying a cream before an oil means the oil is the final layer, which creates a lighter but still effective seal. The order affects how much product is absorbed versus how much sits on the surface, which makes it relevant to your porosity.
LOC for high porosity hair
High porosity hair benefits from LOC because the heavier cream on top of the oil provides an extra layer of moisture protection. High porosity strands lose moisture quickly, so a more substantial final barrier helps hold hydration longer. Choose a rich cream as the final step and a heavier oil — castor, avocado, or olive — to maximize retention.
LCO for low porosity hair
Low porosity hair tends to do better with LCO because oil applied directly to low porosity strands can prevent the cream from penetrating. By applying the cream first (when the hair is still open from washing) and then sealing with a lighter oil, you get moisture in before adding any coating layer. Lighter oils — argan, jojoba, sweet almond — are ideal for the final step on low porosity hair.
Common mistakes
Applying products to dry hair instead of damp or soaking-wet hair reduces how well any layering method works. Using too much of each product leads to buildup without additional moisture benefit. Skipping the liquid step and starting with a cream or oil means there is no actual moisture being sealed — only coating. Start with water or a very diluted leave-in, and build from there.