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Vitamin D

Pretty big NEJM study that seemed to decisively against vitamin D supplementation (going so far as to say people should stop measuring it). This seems like quite a pivot on what has been conventional wisdom that a large percentage of people are deficient and almost all elderly people should be taking vitamin D. Do you agree with the findings of the study?

Rapamycin and cholesterol/glucose/blood pressure

It seems to be understood that rapamycin significantly increases cholesterol, HbA1c and maybe even blood pressure. Some rapamycin forums dismiss this as misleading because it is the body's reaction to calorie restriction, not "true" high cholesterol or blood sugar. Should someone with high cholesterol or pre-diabetes or high blood pressure be concerned about taking rapamycin? Personally, do you see any effect on your blood tests when you're taking it? Or do you measure your cholesterol after cycling off?

Stability Exercise Ideas and Routine

I'm with the zone 2, zone 5, and strength, but how do I exercise to improve my stability? Is there a routine? Is it part of strength training? Does yoga accomplish this? Thank you!

What devices do you recommend for measuring lactate and ketones?

You've spoken before about measuring your lactate and ketones, but I'm not sure the devices you mentioned in earlier podcasts are still current. What do you tell new patients to buy?

Aerobic Training

Any benefit to using the sauna directly after zone two or a zone five session?