The answer is the one that your body can actually absorb and utilize
Cholecalciferol 25 micrograms equivalent to 1000IU Vitamin D3, Water, Glycerol, Pectins, Natural Flavouring, Ascorbic Acid, Phospholipids from Soy Lecithin.
Oral lipotropic supplements require much higher doses to achieve comparable tissue levels, and individuals with malabsorption disorders, gastric bypass, or chronic PPI use absorb oral supplements poorly
Activation of these membrane receptors triggers downstream changes in mitogen-activated protein kinase (MAPK) and phosphatidyl-inositol-3-kinase/AKT (PI3K/AKT) pathways, ultimately influencing gene transcription 61,62
The bidirectional interplay of -synuclein with lipids in the central nervous system and its implications for the pathogenesis of Parkinsons Disease