I've been doing a similar routine + intermittent fasting (Late breakfast/early dinner) + NMN and metformin. Probably isn't doing anything useful.
Re vitamin D: I supplement with that as well, but for a tangential reason: Avoiding sun exposure (esp mid-day) without sunblock avoids photoaging and reduces skin cancer risk. But this leaves you at a Vitamin D deficit, hence the supplement.
I have a tub of taurine, but haven't been taking it; seemed like the evidence was thin, and this article supports that conclusion.
Yes, intermittent fasting seems to have good effects. I used to restrict eating to the period 11am to about 5pm, and I felt better. Now all I do is to avoid eating any food within three hours of going to bed. I don't know how reliable my Apple Watch really is, but my deep sleep ratings are much better when I stop eating after a light early dinner, and this makes some sense: if you are actively digesting food your heart rate is probably increased and generally your body can settle down. As you know, digesting food is a major activity.
Science has shown that the best quality sleep is achieved when core temperature drops about 3 degrees, and this is almost impossible when one has eaten a meal within an hour or two of going to bed.
Or if you live in a hot country. But that makes me suspicious of this finding - it should mean that everyone (without AC) in hot countries sleeps badly. I doubt that to be true though.
Wouldn't surprise me. This is a tough nut to crack because it is likely true, but photo aging and skin cancer are unquestionably true and negative effects of UV exposure.
Are you getting enough vitamin k complex? Depending on the D dose you are taking there are some indications that that might be important to avoid arterial calcification (among other things).
https://pmc.ncbi.nlm.nih.gov/articles/PMC5613455/
Will depend on age and the definition of underweight. Intermittent fasting is probably generally beneficial to maintain the health of already healthy humans up to 75 years of age. But at that age exercise and weights (gently) probably more helpful.
Re vitamin D: I supplement with that as well, but for a tangential reason: Avoiding sun exposure (esp mid-day) without sunblock avoids photoaging and reduces skin cancer risk. But this leaves you at a Vitamin D deficit, hence the supplement.
I have a tub of taurine, but haven't been taking it; seemed like the evidence was thin, and this article supports that conclusion.