Episode 101 of the Bees with Ben podcast showcases the research of Dr Trong Tran, who lectures in

chemistry at the University of the Sunshine Coast, and the magical substance known as propolis! Ben

met Trong at the recent 4 th Australian Bee Congress in Sydney and knew immediately that his work

on propolis would make for a fascinating chat. Propolis is well known to have antioxidant qualities

that may have great therapeutic potential for humans. It helps promote healthy bee hives and can

inhibit foulbroods and chalkbrood.

Trong originally came to Australia from his native Vietnam 14 years ago to work on his Masters

project, which involved searching for bioactive compounds that exhibited anticancer properties in

marine organisms, with a special emphasis on attempting to identify compounds that may be

valuable in the treatment of prostate cancer. He was awarded a PhD degree in Organic Chemistry

from Griffith University in 2015, and then undertook postdoctoral research in the National Cancer

Institute - US National Institutes of Health. In 2019 he was the recipient of an Australian Endeavour

Executive Leadership Award. Trong has thereby gained extensive research experience in natural

product drug discovery but explains to Ben that it can be a very long road from identifying a

beneficial bioactive compound to getting it approved for human use; involving significant investment

from pharmaceutical companies and substantial clinical research. A lot of time and expense can be

spared by focussing on agricultural research - dealing with raw, natural products that are already

consumed by humans with no ill effect. The raw material (rather than an isolated chemical

compound) therefore becomes the product. Trong says this was part of the reason he switched the

subject of his research to agriculture, and then specifically propolis, about 3 years back.

Starting with propolis derived from native stingless bees, he was able to demonstrate wound healing

properties; the propolis helped to improve scars and exhibited anti-scarring activity. Trong then

turned his attention to honey bee propolis, aware that this could represent another significant

source of income for beekeepers. The beneficial properties of propolis appear to derive largely from

bioactive components of plant resins, in particular polyphenols. This large family of organic

compounds is abundant amongst plant species. Trong tells Ben that most premium propolis contains

a high level of polyphenolic compounds, which act as antioxidants and can assist in boosting

immunity and in the treatment of diabetes and other conditions.

How does one consume a daily dose of propolis? Trong says that some people like to make a

tincture, but that this is best stored under cold and dark conditions. Propolis can also be processed

into a powder which can be mixed into drinks or sold as capsules or tablets. And the appropriate

amount? This is currently the subject of further research. The resins in Australian propolis are very

different from those overseas. The recommended dosage for Brazilian green propolis, for example, is

up to 500mg per day. However, when used as a treatment to boost immune function in Covid

patients, 1500mg was used daily. Trong stresses that propolis is not a food, and that more research

is required with Australian propolis to establish, for instance, if there is any toxicity associated with

ingesting large quantities. He says that the propolis industry in Brazil has been going for 30 years,

and that they are consequently far more advanced in understanding level of polyphenolic compounds.