Beef liver is the most nutrient-dense food on the planet. The capsule market exists to skip the taste.
The case for whole liver
Whole liver is cheaper per nutrient delivered. A 500g pack at R185 feeds one person for a week. Capsules cost ~3x more.
Whole liver also has a better nutrient profile - the natural fat carries fat-soluble vitamins more efficiently.
When capsules make sense
If you genuinely cannot stomach the taste, capsules are better than not eating liver at all.
If you're travelling, capsules are the practical compromise.
If you're trying to limit vitamin A intake, capsules let you dose precisely.
How to actually cook liver so you like it
Slice thin (5mm). Pat dry. Soak in milk for 30 minutes if you're sensitive to the metallic taste.
Pan-fry hard in beef fat, 90 seconds per side. Salt aggressively.