Having started Freddd's b12 protocol about 8 weeks ago I've been having spells of sore muscles and intense fatigue. I'm wondering what has caused it and if I've got the wrong levels/balance of potassium, magnesium and calcium. Yesterday, having lowered my daily dose of potassium a bit, a "test dose" of 500mg made me feel better so today I intended to increase my daily dose, divided across my four daily meals. However, I was already feeling bad by 11am after a morning dose of 300mg (sore legs, exhaustion) so took 500mg with lunch. Within half an hour I felt better. Then, half an hour after that, I felt bad again with sore muscles and exhaustion - I've just been lying down for 90 minutes including a nap which is not normal for me. I'm taking 360mg Mg transdermally, divided into a morning and evening dose. I'm not taking any supplemental calcium because it seem to cause me to crash within an hour or two on two previous occasions. Is it likely that I feel better after 500mg potassium because the b12 is causing me to be short on potassium, but that soon after the potassium causes me to need something else which I'm not taking so I feel worse? I'd be very grateful for advice on this - I'm feeling worse on the protocol rather than better despite a promising start. Exhaustion and sore muscles are indications of both too much and too little of any of Ca, Mg and K and there are too many variables for me to be able to sort this out through any straightforward process of elimination that I can think of.