favourite brand of phosphatidylserine and flaxseed oil

[xapakias]

which brand is the best value for money and which is the most potent?

 

[40butpumpin]

PS is expensive. For PS I use Source Naturals Phosphatidyl Serine Complex and for Flax I use Spectrum Essentials Organic High Lignan Flax Oil. Both excellent products. hth