After the perfume and the shampoo, we did a bath soak. Disclosure as always: I work at Longevium, this is our product, this is our sub, please tell me if anything in the formulation is dumb.
Inside the pouch: Dead Sea salt base, magnesium (chloride, sulfate, epsom flakes), GHK-Cu, DSIP, L-theanine, GABA. 1kg pouch.
The interesting choice here is DSIP. Delta sleep-inducing peptide, one of those compounds that's been studied since the 70s, never made it into mainstream pharma, kept getting picked up by sleep researchers and biohackers. Most people who use it inject or do intranasal. We put it in a bath because the warm water and the magnesium chloride do half the absorption work for you, and because nobody wants to inject themselves before bed.
Magnesium chloride absorbs through skin better than epsom salt. Epsom is mostly there for the sulfate, which is its own thing. We put both in because the research is split on which matters more and we got tired of arguing about it internally.
GHK-Cu in a bath soak is the part that'll get questioned the most, fair. The reasoning: GHK-Cu has decent skin data at low concentrations applied broadly, a 1kg bath dilution gives you a mild full-body exposure that won't replace a serum but won't do nothing either. Think of it as a low-dose maintenance application, not a treatment.
L-theanine and GABA are there for the parasympathetic nudge. Both have some transdermal absorption data, both are commonly added to relaxation formulas, neither is going to knock you out. If you want sleep-knockout effects you need oral magnesium glycinate and probably actual melatonin. This is the wind-down ritual layer, not the hammer.
What it's not: a substitute for actual sleep hygiene, therapy, or medication. If you have insomnia diagnosed by a doctor, take a bath but also take the medical advice. If your stress is at "I cry in the parking lot at work" levels, this isn't the answer either, please talk to someone.
What it is: 30 minutes in warm water with a stack of compounds that have plausible relaxation evidence, in a format that's hard to mess up. You can't overdose on a bath. You can't forget the dose. The ritual itself does most of the work, the actives just stack on top.
About the color: deep sapphire blue salt crystals, no added pigment dye, the color comes from the copper in the GHK-Cu. Same logic as the shampoo. We could've made it look like normal beige spa salt, we didn't.
1kg pouch, Dead Sea salt based, vegan, dermatologically tested, compounded in our Dubai lab in small batches.
shop.longevium.clinic if you want to check it out.