Is this a leave-in topical solution? Does it spray both products on at the same time?

It is a leave-in. There are separate nozzles that can be sprayed individually but there is a "cap" that attaches to both and and presses them at the same time. It's recommended that you apply 5 sprays but I assume this means 5 of both with that cap. There is no cap that prevents the nozzles from being pressed.

When is the expire date of this product ???

Hyesang Park, This product exp is 5/2018

Does this product contain ketoconazole? if not, do any ds labs products contain it other than revita shampoo?

DNC-S does not but the Revita Shampoo does.

At the company's website they show every single product sold out....has this company been shut down from selling anything?

No, just reorganized and manufacturing full again.

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💼 Elevate your hair game with science-backed density and color vibrancy!

THICKER HAIR FASTER - Clinically optimized 5% Nanoxidil boosts visible hair density where you need it most.
CUTTING EDGE DELIVERY - Proprietary Nanosome system ensures maximum absorption and long-lasting results.
LIGHTWEIGHT DAILY POWER - Absorbs instantly with zero residue—perfect for busy professionals on the go.
SCIENCE BACKED INGREDIENTS - Copper peptides, caffeine, and biotin team up to nourish your scalp and strengthen strands.
VIBRANT COLOR YOUTHFUL GLOW - Melanex Technology helps maintain natural hair color and reduce early greying for a confident look.

DS Labs Spectral Extra Strength Hair Density Serum combines 5% Nanoxidil, copper peptides, and Melanex Technology in a fast-absorbing, lightweight formula. Designed for daily use, it supports fuller-looking hair and helps maintain natural color by minimizing early greying. Its advanced Nanosome delivery system maximizes ingredient absorption, making it a top-tier solution for men and women seeking thicker, healthier hair.

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