Potential therapeutic benefits of unconventional oils: assessment of the potential in vitro biological properties of some Rubiaceae, Cucurbitaceae, and Brassicaceae seed oils.
Level 5 - mechanism / opinion, no new human data
In vitro bench study assessing chemical profiles and bioactivity assays of commercial oils without human or animal models.
PubMed 37153908 · doi:10.3389/fnut.2023.1171766
What was done
The authors analyzed the fatty acid composition and in vitro biological properties of five commercial cold-pressed seed oils: broccoli, coffee, green coffee, pumpkin, and watermelon. Assays included antioxidant activity (DPPH and ABTS), calculated atherogenicity index (AI) and thrombogenicity index (TI), in vitro anti-inflammatory capacity (bovine serum albumin denaturation assay), enzymatic inhibition of acetylcholinesterase, butyrylcholinesterase, and tyrosinase, and anti-biofilm activity against gram-positive and gram-negative bacteria evaluated by MTT colorimetric assay.
What was found
Broccoli seed oil contained 84.3% unsaturated fatty acids (33.1% erucic, 20.6% linolenic, 16.1% linoleic) and saturated fatty acids including palmitic (6.8%) and stearic (0.2%), with an AI of 0.080 and TI of 0.16. Anti-inflammatory IC50 values were under 8.73 micrograms for all oils except watermelon seed oil. Butyrylcholinesterase was inhibited most effectively by coffee and broccoli seed oils (IC50 = 15.7 micrograms and 20.7 micrograms, respectively). Tyrosinase was inhibited most by pumpkin and green coffee seed oils (IC50 = 2 micrograms and 2.77 micrograms, respectively). Broccoli and green coffee seed oils showed the best acetylcholinesterase inhibition. Several oils inhibited bacterial biofilm formation and mature biofilms, with Staphylococcus aureus being the most sensitive strain. Specific numeric values for antioxidant tests and exact biofilm reduction percentages were not reported in the abstract.
Why it matters
This study provides comparative baseline chemical and in vitro bioactivity profiles for several non-traditional seed oils, identifying candidate extracts for future nutritional or pharmacological screening.
Limits
All findings are limited to cell-free in vitro biochemical assays with no testing in animal models or humans, providing no evidence of bioavailability, safety, or in vivo efficacy. The high concentration of erucic acid in broccoli seed oil represents a potential toxicity concern that was not clinically evaluated. Numerical results for antioxidant and biofilm assays are missing from the abstract.
Cited by
- supports Broccoli seeds contain approximately one-third fat or oils and are very rich in erucic acid, an omega-9 fatty acid.