View source for Most people can expect to live to 90-95 years if they follow healthy lifestyle

(1) https://pubmed.ncbi.nlm.nih.gov/29712712/ In USA, men with 5 healthy factors lived 87.6 years (men without healthy factors lived 75.5 years). <br/>
Women with 5 healthy factors lived 93.1 years (women without healthy factors lived 79 years). <br/>
The 5 health factors were very easy: (1) no smoking (2) moderate alcohol (3) BMI 18.5 -- 24.9 (4) >30min/day physical activity (5) top 40% diet quality <br/>
All of that can be easily achieved by anyone. More strong adherence to healthy lifestyle would lead to even longer expected lifespan. <br/>

(2) https://pubmed.ncbi.nlm.nih.gov/31915124/ <br/>
Men who followed 3 elementary and 2 slightly more complicated rules of healthy lifestyle lived an average of 91 years (of which 82 were cancer/serious heart disease/diabetes free). Though, these were not ordinary men: 58% were dentists, 20% veterinarians, 8% pharmacists, 7% opticians, 4% osteopaths, 3% orthopedists, all from the US.  <br/>
https://sites.sph.harvard.edu/hpfs/about-the-study/

Their 3 elementary rules of a healthy lifestyle: <br/>
- never smoke. <br/>
- have a BMI of 18.5 - 24.9 <br/>
- Every day at least a half an hour of brisk walking / similar activity. <br/>
1 more complicated rule of healthy lifestyle: <br/>
- Drink an average of 5 to 30 grams of ethanol per day (that's about 60 to 380 ml of 10% wine a day) <br/>
Probably if you drink less it would be good as well, but authors didn't count that as healthy factor. <br/>
- Be in the top 40% on the AHEI Healthy Eating Index <br/>

(3) https://pubmed.ncbi.nlm.nih.gov/31750895/ Chinese living in Singapore <br/>
Six healthy factors: (a) BMI 18.5 to 21.4 (up to 24.4 for >65 years), (b) never smoking, (c) >0 to 14 drinks/week (for women half as many), (d) >2 hours moderate activity/week, (e) AHEI top40%, (f) sleep 6-8 h <br/>
Men with 5/6 health factors who lived to age 50 could expect to live 87.8 years (women 89.8), suppl.fig.7 <br/>
Following such simple rules!  What if they actually took care of their health seriously? <br/>
(btw, men with an average score of 2.73 who lived to age 50 could expect to live ~83 years (women at 87.3))  <br/>