Why Does Nopsor Smell? An Honest Explanation.

Michelle Logan put it best in her testimonial. After describing the patches fading, the itching stopping, and sleeping through the night for the first time in years, she said:

That's the honest part of it. Nopsor has a distinctive smell. It comes from coal tar — and coal tar is what makes the product work. You cannot separate the two. What you can do is understand it, manage it, and decide whether the trade-off is worth it. For most people who have lived with psoriasis for years, it is.

What Causes the Smell

The smell comes from coal tar — specifically from the polycyclic aromatic hydrocarbons that give coal tar its therapeutic properties. Coal tar has been used to treat psoriasis for over 100 years. It works by slowing the accelerated skin cell turnover that produces plaques. The same compounds responsible for that mechanism are also responsible for the odor.

This is not a manufacturing defect or a sign of poor formulation. It is inherent to coal tar at therapeutic concentrations. Every coal tar product — Nopsor, MG217, T/Gel, prescription formulations — has some version of this smell. The question is only how strong it is and how well the formulation manages it.

Nopsor's formulation includes 8 botanical herbs — thyme, rosemary, elderflower, walnut leaf, mastuerzo, saponaria, espinosilla, and oregano — that contribute their own natural scents and partially offset the coal tar odor. The result is distinctive but not overwhelmingly harsh. Most users describe it as earthy or medicinal rather than chemical. Shawn Paul, who had tried coal tar products before, noted that Nopsor was meaningfully different from the greasy, overpowering coal tar products he'd previously abandoned.

Why You Can't Remove the Smell Without Removing the Effect

This is worth understanding clearly, because it explains why fragrance-masking isn't the solution. The aromatic compounds in coal tar are not byproducts that can be filtered out — they are part of the active fraction. Research into coal tar's mechanism has identified polycyclic aryl hydrocarbons, particularly carbazole, as the likely therapeutic agents. These are the same compounds that produce the odor.

Products that claim coal tar's benefits while being fragrance-free or odorless are either using very low concentrations — reducing both the smell and the efficacy — or masking the odor heavily with synthetic fragrance, which adds its own skin sensitivity concerns. José Luis Aguilar Sánchez made a deliberate formulation choice to use the herbs as a natural counterbalance rather than synthetic fragrance. The smell is real, but what you're smelling is the treatment working.

The Shampoo vs. The Pomade

The shampoo and the pomade have the same active ingredients but different odor profiles in practice. The shampoo is a rinse-off product — the coal tar scent is present during application but largely gone after rinsing. Most users find the shampoo step unproblematic.

The pomade is where the odor question is most relevant, because it stays on overnight. The petrolatum base keeps the active ingredients — and their scent — in contact with skin for hours. This is exactly what makes it effective, and exactly what makes the odor more noticeable. The trade-off is built into the design.

The concentration difference also matters here: the shampoo has a higher coal tar concentration (2.2%) but brief contact time. The pomade has a lower concentration (1.6%) with extended overnight contact. The lower concentration in the pomade means the overnight odor is somewhat milder than the shampoo's initial application scent — but it persists longer.

Practical Ways to Manage It

Most Nopsor users adapt within 1–2 weeks. The smell is most noticeable when it's new — your brain stops registering familiar background scents over time. Here are the approaches that work best:

The Perspective That Helps Most

Psoriasis patients who have tried injections, biologics, phototherapy, and years of prescription topicals tend to have a very different relationship with the smell question than someone encountering coal tar for the first time. When you've spent years dealing with treatment side effects, medical procedures, and the daily physical discomfort of active psoriasis, a distinctive nighttime smell is a manageable inconvenience — not a barrier.

Shawn Paul had tried coal tar before and hated it. What changed his mind was the formula — the herbs, the vehicle, the way it absorbed differently from the greasy products he'd experienced. He used it. His psoriasis cleared in a month. He's been using it preventively for years.

Michelle called it "the honest part of it" — and then described sleeping through the night without itching for the first time in years.

The smell is real. So are the results.