Mmmmm! Irritable bowel argh... that means there are allergies and liver congestion too that has to be dealt with.

Basically, Acne indicates tons of impurities in the bloodstream. People manifest this in different ways, and Acne tends to be the way that Pitta people manifest it. Has your sister taken the Dosha test? Does she know what blood type she has?

She has to avoid bad fats and congesting foods like all dairy, even eggs, meats, deli, mayo ... and then she needs to take the good fats such as flax seed oil regularly. Probiotics are also good, lots of dark green veggies and pancreatic enzymes. This will ensure that things get digested thoroughly. Bile and fats are broken down by microbes. If they're not there doing their job, congestion results.

If she is a true Pitta, she shouldn't be eating hot spices like cayenne, ginger, cumin, cloves, cinamon, black pepper.

I've rarely had much success with addressing the skin directly, usually my skin only responds best to colon/ Liver Cleanses and diet, and once I have that handled, I get one facial to take care of the last remaining extractions. But there are ways to draw out the toxins through the skin - sweating due to exercise or detox bath is fantastic and necessary, and she can coat her face with a paste of powdered ginger. Bentonite Clay will also draw out toxins.

If the Acne is also due to a hormonal imbalance, Liver Cleansing will address this just fine. Make sure she takes something like Planetary Formula's Bupleurum Liver Cleanse.

Acne often has emotional issues involved too, so some kind of emotional release therapy should be looked into - Massage, chiropractic, tapping, creative visualization...

I'll have to check my juicing book when I get home to see what it says. Biotin is recommended I'm sure but there are probably other things.