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600iu per day is normal. However if you have a severe deficiency of vit D then it's not unusual to take 10000iu for 3 days before reverting back to 600iu per day

Yes i can understand the implications of such advice on open forum. Hope to hear from you on the CC once i can log on. Hope it doesn't take too long as i'm due to go back to the job tomorrow pm.

Ok Thanks Registration Pending

Hi guys Just looking for a little assistance on this as its puzzled me. Got called out to a 40 CDI today that wasnt firing. Upon enquiring, customer advised that many parts had previously been replaced... namely; Fan, gas valve, primary heat exchanger... All by worcester bosch engineers...