I just did a little research on PubMed, looking for reports of clinical studies on transdermal vitamin and mineral delivery systems. I continue to have doubts about the PatchMD system. But here are a few articles, and links to the searches so you can peruse the results yourself:
Vitamin + (transdermal delivery):
http://www.ncbi.nlm.nih.gov/pubmed/?term=vitamin+"transdermal+delivery"
AAPS PharmSciTech. 2015 Jan 22. [Epub ahead of print]
Investigating Transdermal Delivery of Vitamin D3.
Alsaqr A1,
Rasoully M,
Musteata FM.
Author information
- 1Department of Pharmaceutical Sciences, Albany College of Pharmacy and Health Sciences, 106 New Scotland Avenue, Albany, New York, 12208, USA.
Abstract
Transdermal delivery of therapeutic amounts of vitamin D3 is proposed to overcome its variable oral bioavailability, especially for people who suffer from fat malabsorption. The main challenge for this delivery route is to overcome the barrier properties of skin, especially for very lipophilic compounds such as vitamin D3. In this study, the effect of different penetration enhancers, such as oleic acid, dodecylamine, ethanol, oleic acid in propylene glycol, isopropyl myristate, octyldodecanol, and oleyl alcohol in propylene glycol were evaluated in vitro for their effectiveness in deliveringvitamin D3 through polyamide filter, polydimethylsiloxane membrane, and porcine skin. A diffusion cell was used to study the transdermal permeability of vitamin D3. Ointment formulations of vitamin D3 were prepared containing the most widely used penetration enhancers, oleic acid, and dodecylamine. The ointment containing oleic acid as chemical penetration enhancer did not improve delivery compared to control. On the other hand, the formulation containing dodecylamine as a penetration enhancer did improve the transdermal delivery of vitamin D3. However, statistical significance and an amount high enough for nutritional supplementation purposes were reached only when the skin was pretreated with 50% ethanol. In these conditions, the ointment delivered an amount of 760-ng vitamin D3 per cm2 of skin. The research shows promise that transdermal delivery could be an effective administration route for vitamin D3 when ethanol and dodecylamine are used as penetration enhancers.
This one has the full-length article available:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3976443/
Int J Biomed Sci. 2014 Mar;10(1):21-4.
Topical delivery of vitamin d3: a randomized controlled pilot study.
Sadat-Ali M1,
Bubshait DA1,
Al-Turki HA1,
Al-Dakheel DA1,
Al-Olayani WS1.
Author information
- 1College of Medicine, University of Dammam, King Fahd Hospital of the University, AlKhobar, Saudi Arabia.
Abstract
BACKGROUND AND OBJECTIVE:
The purpose of the present study is to explore the assessment if the transdermal delivery of vitamin D is feasible.
METHODS:
In 50 female Medical students, this study was conducted. Age, weight and height was taken, a detailed history and clinical examination was performed. Blood was drawn for 25 Hydroxy Vitamin D3 (25OHD) level. Two women had >30 ng/mL of 25OHD and was excluded from the study. The participants were divided into two groups of 24 in each arm. All participants equivocally agreed not to change their dietary habits and life style till the study was over. The study group of women were asked to apply; Top-D (Aloe Vera based- Vitamin D3) (Patency Pending) was developed at King Fahd Hospital of the University, AlKhobar with each gram of the Top-D cream delivering 5000 IU of vitamin D3. The second group used 1 gram of Aloe vera gel. The participants had no knowledge to which group they belong. A second blood sample was taken at the end of 3 months and the data was analyzed.
RESULTS:
The data of 48 women was available for analysis. The average age was 22.58 ± 1.95 years. The mean pre-treatment 25OHD in the study group was 12.05 ng/Ml ± 6.54 and post-treatment was 37.95 ng/mL ± 6.43 (P=0.001, CI<28.582 ). In control group pre-treatment 25OHD was 11.4 ng/mL ± 3.97 and post-treatment was 10.58ng/mL ± 3.03.
CONCLUSIONS:
This randomized control study shows that vitamin D3 can safely be delivered through the dermal route. This route could be exploited in treating vitamin D deficiency.
Calcium + (transdermal delivery):
http://www.ncbi.nlm.nih.gov/pubmed/?term=calcium+"transdermal+delivery" NO RELEVANT RESULTS
Iron + (transdermal delivery):
http://www.ncbi.nlm.nih.gov/pubmed/?term=iron+"transdermal+delivery"
Full length article - in rats - required prepping the skin with needles:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3578117/
Pharm Res. 2013 Mar;30(3):889-98. doi: 10.1007/s11095-012-0930-2. Epub 2012 Nov 28.
Microporation and 'iron'tophoresis for treating iron deficiency anemia.
Modepalli N1,
Jo S,
Repka MA,
Murthy SN.
Author information
Abstract
PURPOSE:
Iontophoretic mediated transdermal delivery of ferric pyrophosphate (FPP) in combination with microneedle pretreatment was investigated as a potential treatment for iron deficiency anemia (IDA).
METHODS:
In vitro transdermal delivery studies were performed using hairless rat skin and pharmacodynamic studies were performed in hairless anemic rat model. The hematological and biochemical parameters like hemoglobin, hematocrit and % serum transferrin were monitored in rats at healthy, anemic condition and post treatment. Micropores created by the microneedles were visualized in histological skin sections after staining with hemotoxylin and eosin. The recovery of micropores was investigated in vivo by measuring Transepidermal water loss (TEWL) at different time points.
RESULTS:
The passive, microneedle and iontophoresis mediated delivery did not lead to significant improvement in hematological and biochemical parameters in anemic rats, when used individually. When iontophoresis (0.15 mA/cm(2) for 4 hours) was combined with microneedle pretreatment (for 2 min), therapeutically adequate amount of FPP was delivered and there was significant recovery of rats from IDA.
CONCLUSIONS:
Microneedle and iontophoresis mediated delivery of iron via transdermal route could be developed as a potential treatment for IDA. The transdermal controlled delivery of iron could become a potential, safe and effective alternative to parenteral iron therapy.
I did find this interesting 2014 article about vitamin D supplementation - I don't know why it was published in the Journal of Animal Science, however!
https://www.animalsciencepublications.org/publications/jas/articles/92/3/893