Histogen was dead 10 years ago. There were plenty of discussions on it on different forums and I explained it then.
The problem isn't funding, or "getting things done" but simple efficacy. The "positive data" were no more impressive than things like ACELL+PRP.
It's just growth factors. It's in the same league as PRP, ACELL+PRP, amniotic fluid, kerastem, exosomes etc.. They work, but poorly and a single injection session is going to be very, very weak. You'd need a ton of sessions to make a real difference. That's why they had to use joke photos where they completely changed the direction of hair, angles etc. It's simply no better than any other presently available treatment.
You need to understand what you are dealing with. They've been around since the 80s. Back then they were called "Advanced Tissue Sciences".
They went public in 1988 and were producing growth factors from fetal foreskin. They never made any money and eventually went bankrupt in 2003.
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"Advanced Tissue, which went public in 1988, used cells from the foreskins of circumcised newborns to make its skin products."
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"On 31st March 2003 Advanced Tissue Sciences (ATS) was liquidated, with the effect that in excess of US$300 million of stakeholder financing was destroyed. Although successful in the development of breakthrough technologies in the regenerative medicine arena and the building of a substantial portfolio of patents, the company never made a profit."
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Naughton simply rebooted them as "Histogen" and tried hyping up the growth factors as some sort of magical hair treatment. It's a classic case "overpromise and underdeliver."
Growth factors have been hyped up forever. Do they work? Sure, but not very well. Women have been smearing them into their skin for a long time. Does it help a bit? Sure. Does it make them 18 again? Not even close.
The real issue with Histogen is that it simply isn't effective. It doesn't matter if it came out tomorrow. People have this delusion that it's some sort of space age technology that is somehow stuck in red tape but oh so close. The poster HelloUser tried to push that argument 6 years ago. "We will just have to go to Mexico to get magic hair growth injections!"
You don't need to go to Mexico to get growth factors. They are already exist and they just aren't very good.