I have tried preformed Vitamin A (3000 mcg/10000 iu) on it's own and after a week it gave me tightness in the neck and not a good feeling in the joints. I started to look and research for what was happening.
Then after research I added 3000 ius of Vitamin D3 and 100 to 200 mcg of K1 Phylloquinone (my body can convert it to other K2 forms easily). Along with that I brought the dosing of Vit A to 3 times a week (at 10000 iu).
All of my tightness, aches and pain were almost gone in a week. After 2 weeks, I was feeling great sense of ease in my body, a lot clarity in my vision. I was feeling fresh and energetic. Morning wood is experienced more often. Mental sharpness is remarkable, probably it's because D3 is a neuro-steroid and increases information processing speed.
Basically I am feeling whole again after balancing A/D/K.
If I take Vit D3 without Phylloquinone, sex drive starts to get diminished in a few days. But adding K1 brings it back to youthful levels.
MK-4 and MK-7 gave me terrible side effects. (MK-7 High blood pressure and MK-4 makes me joints hurt and everything feels off)
Following research/information will shed some light on why I am feeling these benefits.
https://lmreview.com...ends-longevity/
https://www.easy-imm...ysfunction.html
Hope this will help people who are looking to make D3 work or make Vit A work properly.