Need advise on dietary supplements
40M 168cm 76kg lost 5kg in 2 months. Non smoker Non drinker. No diabetes or BP. Have Atopic Dermatitis using only topical steroids 2x weekly as per dermatologist advise. Diet Non veg 1.5g protein per kg no sugar. Routine 2 years training. 8 day cycle 2-on 1-off 3-on 2-off. 45 minutes fasted workouts. 7h sleep. Supplements 3g Creatine post workout and L Citrulline pre workout. No anabolic steroids. Questions 1. Best vitamins for CNS and muscle recovery in deficit 2. Any supplement interactions with topical steroids 3. Blood markers to check 4.Joint support advice.