Hair product names can be very persuasive. Darkenyl sounds like it will darken grey hair; Redensyl sounds like it will make hair dense. But do the names match reality?
In this article based on his Q&A video, Dr. John Watts — dermatologist, trichologist and hair transplant surgeon in Hyderabad — answers viewer questions about these products, a 9,000-graft transplant request, and derma rollers for hair fall.
Don't take brand names literally
A viewer asked whether 1% Darkenyl would turn his grey hair black and whether 3% Redensyl would make his hair dense and strong. Dr. Watts cautions against believing brand names as literal truths when it comes to hair growth oils, serums or lotions.
“The names could be misleading as by ‘Darkenyl’ one could assume that the grey hair would turn dark, or one could read ‘dense’ in Redensyl to mean that hair would become dense after use. This is not the case,” explained Dr. John Watts. By that logic, he joked, one would find Mysore in Mysore Bajji.
For hair growth, only two US FDA-approved drugs — Minoxidil and Finasteride — are available in the market.
What actually helps with premature greying
For greying at a young age, Dr. Watts advises consulting a dermatologist to check for deficiencies in Vitamin B12, Vitamin D or serum ferritin, and taking Para-aminobenzoic acid (PABA) tablets to control greying.
He is honest about the limits: there will not be 100% results from these supplements, and completely erasing grey hair is impossible — but further greying can definitely be controlled. “Even if 75% of your grey hair turns black, the remaining 25% grey hair will become noticeable,” he explained.
For density, medically approved options include Minoxidil and Finasteride, followed by mesotherapy including GFCs, stem cell treatment, PRP and derma roller. “But, Redensyl alone cannot give you dense hair,” said Dr. Watts.
Do you really need 9,000 grafts?
Another viewer asked the cost of a 9,000-graft transplant. Dr. Watts questioned how he arrived at that number in the first place. “You cannot do 9000 hair grafts transplants in one sitting. Furthermore, for such a huge number of grafts, you need ample donor hair region,” he explained — adding that the viewer may not need a transplant at all and should get an expert opinion first, since his condition might be treatable with simple medication.
Where does the derma roller fit in?
Can a derma roller control hair fall? Yes, says Dr. Watts — but it is not the first line of treatment. First find out whether your hair fall is due to simple reasons like nutritional deficiency or whether it is genetic. Simple causes may need only good nutrition and medication. If lifestyle changes and medication do not help, options like mesotherapy — including stem cell treatment, GFCs and PRP — come next, then the derma roller. “The last option is to undergo a hair transplant procedure,” explained Dr. Watts.
The bottom line
Product names are marketing, not medicine. Only Minoxidil and Finasteride are US FDA-approved for hair growth; greying needs deficiency correction and PABA under medical guidance, and grey hair can be controlled but never fully erased. Before chasing big-ticket solutions like a 9,000-graft transplant, get a proper diagnosis — you may need far less than you think.
This article is for educational purposes only and is not a substitute for professional medical advice. Consult a qualified dermatologist for diagnosis and treatment.
Frequently asked questions
Will Darkenyl turn grey hair black?
No. Dr. John Watts warns that brand names like Darkenyl are misleading and should not be taken literally. Completely erasing grey hair is impossible, though further greying can be controlled with proper treatment.
What helps control premature grey hair?
Consult a dermatologist to check for Vitamin B12, Vitamin D or serum ferritin deficiency, and consider PABA (Para-aminobenzoic acid) tablets. Results are partial — greying can be controlled, not reversed completely.
Can Redensyl alone make hair dense?
No. For density, Dr. Watts points to the FDA-approved drugs Minoxidil and Finasteride, followed if needed by mesotherapy including GFC, stem cell treatment, PRP and derma roller.
Is a 9,000-graft hair transplant possible in one sitting?
No. Dr. Watts explains that 9,000 grafts cannot be done in one sitting and would require an ample donor area — and many people asking for large transplants may not need surgery at all.
