July 2020 in “International journal of biology sciences” Coconut oil mixed with egg yolk and vitamin E may improve rabbit hair growth more than other plant oils.
August 2019 in “Journal of The American Academy of Dermatology” 5% minoxidil foam effectively regrows hair in women, with postmenopausal women seeing the most improvement.
April 2017 in “Journal of Investigative Dermatology” SIG-1451 could be a promising new treatment for atopic dermatitis.
January 2016 in “Hair therapy & transplantation” Hair UpTM effectively and safely promotes hair regrowth, especially in minors.
December 2015 in “Dermatologic Therapy” Zinc sulfate solution is more effective than tea lotion for treating acne rosacea.
August 2015 in “Europe PMC (PubMed Central)” 
October 2014 in “Cancer Research” A new topical treatment may prevent hair loss from cancer therapy by adjusting cell death processes in hair follicles.
January 2011 in “The Internet Journal of Pharmacology” 
March 2005 in “Journal of the American Academy of Dermatology” Bexarotene 1% topical gel helped some patients with alopecia areata regrow hair.
January 2004 in “Side effects of drugs annual” Certain skin drugs and topical agents, including some natural extracts and fragrances, can cause allergic reactions. Some hair dyes and extensions, as well as minoxidil, a hair growth treatment, can also cause allergies. Botulinum toxin A can effectively reduce sweat but may have temporary side effects.
September 1998 in “Journal of the European Academy of Dermatology and Venereology” Autoimmune and inflammatory processes are involved in both scarring and non-scarring types of hair loss.
July 1996 in “Clinical and Experimental Dermatology” Putting calcipotriol ointment on the skin once doesn't change calcium levels in the body right away.
More minoxidil applied topically leads to better hair growth in male pattern baldness.
New treatments for skin diseases in 1979 showed promising results with fewer side effects.
December 2022 in “Archives of Dermatological Research” Adding cetirizine to minoxidil improves hair growth and thickness in women with androgenetic alopecia.
October 2022 in “Dermatologic Therapy” Both treatments for resistant alopecia areata were equally effective.
January 2021 in “Asian Journal of Research in Dermatological Science” September 2019 in “Case medical research” January 2018 in “International Journal of Medical Reviews and Case Reports” Bimatoprost 0.03% solution may help treat hair loss.
November 2016 in “Cochrane Clinical Answers” September 2015 in “American journal of biomedicine” 
July 2014 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Applying valproic acid on the scalp increased hair growth in men with hair loss.
March 1998 in “Journal of Dermatological Science” Combining RU58841 and minoxidil significantly increases hair growth.
131 citations,
October 2004 in “Clinical Cancer Research” Tempol is safe and may prevent hair loss from brain radiotherapy.
115 citations,
November 1999 in “Journal of The American Academy of Dermatology” Minoxidil increases hair weight and count temporarily in men with hair loss.
71 citations,
January 2004 in “Dermatology” Oral finasteride works better than topical minoxidil for hair growth, both are safe.
49 citations,
January 1991 in “Food and chemical toxicology” Different zinc compounds cause varying levels of skin irritation in animals.
44 citations,
January 1997 in “British Journal of Dermatology” 
32 citations,
June 2015 in “Dermatologic Therapy” Finasteride and minoxidil together work best for male hair loss.