nope. Anthocyanins are water soluble. there is no way they would still be in extracts that have seen aqueous washes.
If the color change was residual anthocyanin, then the makers of Drobinol would not have a problem with their shit turning red, and would not have formulated in sesame oil to prevent it.
Here is a copy and paste of results in the synopsis of a government published study:
from the national library of medicine;
“RESULTS:
The appearance of the dronabinol capsules remained unaltered during frozen, cold, or room-temperature storage. Regardless of storage condition, the percentage of the initial Δ9-THC content remaining was greater than 97% for all evaluated samples at all time points over the three-month study. These experimental data indicate that the product packaging and the sesame oil used to formulate dronabinol capsules efficiently protect Δ9-THC from oxidative degradation to cannabinol; this suggests that pharmacies can store dronabinol capsules in nonrefrigerated automated dispensing systems, with a capsule expiration date of 90 days after removal from the refrigerator.”
Full link: Stability of dronabinol capsules when stored frozen, refrigerated, or at room temperature - PubMed
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