TLDR The treatment improved hair growth and thickness in patients with hair loss, even 10 months after therapy without additional products.
The follow-up study by Toffanello et al. from 2021 focused on the long-term effects of vacuum therapy combined with plant bioactive compounds, prebiotics, and probiotics on hair growth in 7 participants with severe cases of androgenetic alopecia, female pattern hair loss, and telogen effluvium. These participants were part of a larger initial study of 25 individuals and were followed for an additional 10 months after the initial 57-day treatment period. The results indicated that 29% of participants experienced intense hair growth, 42% moderate hair growth, and 29% light hair growth, with 57% showing increased hair strand thickness and 43% a slight increase. The study concluded that the treatment was effective in promoting hair growth and increasing hair strand thickness even 10 months after the therapy had ended, without the use of any home care hair products.
2 citations
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April 2021 in “Dermatologic Therapy” Low-level laser therapy helps increase hair growth in female pattern hair loss but not in telogen effluvium.
October 2020 in “Journal of Cosmetic and Laser Therapy” Using your own platelet-rich plasma (PRP) can effectively treat hair loss, increasing hair density and width with no side effects.
October 2020 in “International Journal of Medical Arts (Print)” 
May 2020 PRP therapy with Derma roller effectively promotes hair re-growth and reduces hair fall in women with pattern hair loss.
1 citations
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January 2020 in “PubMed” 2 citations
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November 2019 in “Journal of Cosmetics, Dermatological Sciences and Applications” 14 citations
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September 2018 in “Indian Journal of Dermatology, Venereology and Leprology” 
3 citations
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December 2016 in “International Journal of Research in Medical Sciences” Using both minoxidil and platelet-rich plasma therapy together is more effective for hair growth in women than using minoxidil alone.
5 citations
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December 2014 in “Medicine and Pharmacy Reports” Ciproterone acetate improves hair regrowth and acne in most female patients.
45 citations
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March 2013 in “European Journal of Plastic Surgery” Injecting platelet-rich plasma is a safe and effective way to treat hair loss.
39 citations
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October 2012 in “International Journal of Trichology” Melatonin solution helps treat hair loss in men and women.
The product made from plant extracts was tested for treating hair loss caused by genetics.
July 2004 in “Indian Journal of Dermatology” 
7 citations
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January 1990 in “Clinical and Experimental Dermatology” Hair loss gradually happens, and minoxidil helps regrow hair.
54 citations
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March 1987 in “Journal of The American Academy of Dermatology” 3% topical minoxidil effectively treats extensive alopecia areata with few side effects.
