ov ▁participated ▁in ▁four ▁exped itions ▁above ▁ 8 ▁ 0 0 0 ▁meters , ▁which ▁hasn ' t ▁been ▁done ▁by ▁any ▁other ▁known ▁veg an ▁or ▁a ▁Bulgar ian . ▁At anas ▁Sk at ov ▁cons iders ▁that ▁exam ining ▁the ▁veg an ▁di et ▁is ▁the ▁most ▁prominent ▁scientific ▁research , ▁he ▁has ▁ever ▁done . ▁In ▁January ▁ 2 0 1 7 , ▁he ▁marked ▁six ▁years ▁of ▁the ▁beginning ▁of ▁his ▁veg an ▁l ifest yle ▁which ▁he ▁says ▁he ▁has ▁no ▁intention ▁to ▁change . ▁He ▁is ▁regularly ▁subject ▁to ▁blood ▁tests , ▁checking ▁the ▁important ▁for ▁a ▁human ▁being ▁indices . ▁Additionally , ▁he ▁maintain s ▁a ▁di ary ▁regarding ▁sport ▁activities ▁and ▁his ▁mental ▁health . ▁ ▁In ▁ 2 0 1 7 , ▁Sk at ov ▁took ▁part ▁in ▁two ▁exped itions ▁for ▁clim bing ▁eight - th ous and ers ▁in ▁H imal ay as ▁before ▁mon so ons . ▁On ▁ 1 6 ▁May ▁ 2 0 1 7 ▁he ▁clim bed ▁successfully ▁the ▁fourth ▁highest ▁sum mit ▁on ▁the ▁planet ▁- L hot se , ▁ 8 5 1 6 m . ▁Only ▁ 5 ▁days ▁later ▁Sk at ov ▁clim bed ▁successfully ▁on ▁ 2 2 ▁May ▁Ever est , ▁ 8 8 4 8 ▁for ▁second ▁time , ▁but ▁now ▁from ▁south ▁side . ▁So ▁At anas ▁Sk at ov ▁is ▁the ▁first ▁Bulgar ian , ▁who ▁clim bed ▁Mount ▁Ever est ▁from ▁north ▁and ▁from ▁south ▁rid ges