Hi there,
I see a lot of comment about reducing PUFA intake, especially from veg oils. However, what has always confused me is that I thought the conversion of linoleic acid (from veg sources) to arachidonic acid - and subsquent downstream pro-inflammatory molecules - was extremely poor.
In this light, wouldn't PUFA (in the form of arachidonic acid) from animal sources be more deleterious? Moreover, unlike plant-based sources, wouldn't the PUFA issue from animal food be compounded by the lack of naturally-occuring vitamin E to counteract lipid peroxidation?
I always get confused by PUFA discussions. The whole thing about balancing omega 3:6 ratios always seemed odd to me because articles don't account for the poor conversion of linoleic acid and alpha linoleic acid into LA, and EPA and DHA respectively. For example, balancing 4g of linoleic acid from veg sources with 4g of omega 3 from oily fish is daft as the fish is providing far more potent downstream metabolites - it's not comparing like for like at all.
Anyway, I would appreciate others thoughts on the first bit as I know Ray Peat is very critical of PUFAs and urges us to limit them.
Many thanks in advance,
Rob
I see a lot of comment about reducing PUFA intake, especially from veg oils. However, what has always confused me is that I thought the conversion of linoleic acid (from veg sources) to arachidonic acid - and subsquent downstream pro-inflammatory molecules - was extremely poor.
In this light, wouldn't PUFA (in the form of arachidonic acid) from animal sources be more deleterious? Moreover, unlike plant-based sources, wouldn't the PUFA issue from animal food be compounded by the lack of naturally-occuring vitamin E to counteract lipid peroxidation?
I always get confused by PUFA discussions. The whole thing about balancing omega 3:6 ratios always seemed odd to me because articles don't account for the poor conversion of linoleic acid and alpha linoleic acid into LA, and EPA and DHA respectively. For example, balancing 4g of linoleic acid from veg sources with 4g of omega 3 from oily fish is daft as the fish is providing far more potent downstream metabolites - it's not comparing like for like at all.
Anyway, I would appreciate others thoughts on the first bit as I know Ray Peat is very critical of PUFAs and urges us to limit them.
Many thanks in advance,
Rob