@chippydoo
Not sure who you are asking for brand name. I use the following supplement companies. Thorne, Life Extension, Qunol, and Puritan Pride.

I do shop around for sales and rewards so that influences me on which vendor I use. Qunol for example has some really good prices on Ubiquinol and Co-Q-10. Life Extension has really good magnesium and resveratrol. But I use Puritan Pride all the time which has a very expansive product line.

The only problem with Puritan Pride is in stock issues. I have researched the above companies for quality control and reported quality issues and all are listed as good. I say that with caveat that vitamin and supplement companies are not under FDA quality control or verification.

@chippydoo I am taking OmegaVia Brand. ChatGPT recommends the following based on purity: Nordic Naturals Ultimate Omega, Viva Naturals Triple-Strength and OmegaVia Ultra Concentrate. All are more expensive than those found on-line or at Costco. They said to look for "third party testing"and certifications like IFOS. Good Luck.