Thank you for your reply. It sounds like you've been on quite a journey with your health over this past while. From my understanding an imbalance of IgG1 is related to the healthy of your adaptive immune system, moderated by helper-T-Cell-1 (Th1) in your body. In western medicine it is still quite challenging to pinpoint exactly where in the cycle the imbalance occurs and so doctors often resort to simply topping the patient up with Polygam in the hope that it acts as a band aid and contains the problem.
This does nothing to change the underlying issue, and in more holistic therapies there is often a lack of emphasis on the specific faulty step in the immune pathway, with more emphasis being placed on improving your immunity in general. Steps to this regard include a diet free of any foods that stoke the immunity fire, whether it is in an obvious allergic reaction or a more subtle immune response. Common foods to eliminate include meat, especially red meat, wheat and other gluten-containing grains, sugar and other artificial sweeteners, dairy (apart from goats milk products) and processed/preserved foods.
Secondly a healthy yet gentle exercise routine that encourages lymphatic and blood flow but without muscle destruction and subsequent inflammation is very beneficial. Try yoga or tai chi to begin with.
Thirdly ensure that the ingredients your body needs to produce a healthy well-balanced immune system are present in your body all the time. These include Vitamin D - make sure levels are in top form, Omega 3 fatty acids - high doses of DHA and EPA, and foods rich in living enzymes such as raw leafy greens or green vegetable juices. Spirulina in tablet form is a great way to get this last component into your diet.
I hope these tips have been helpful. It is a long road you have chosen to walk, but it is not a hopeless one.
Many thanks and warm regards