Acne can be caused due to hormonal issues, improper diet or lifestyle habits. Most cases of acne  can be resolved or improved by supplementation of :

Vitamin A 

Vitamin C

Zinc 

and in cases of cystic acne 

MSM

Most people live stressful lives and suffer from undiagnosed adrenal fatigue. The natural supplements that are effective with this condition are:

Ashwagandha with Vitamin C

Ginseng  

Diabetes is controlled by following a healthy diet and exercise however there are a few natural supplements that can assist in the control of high blood sugar.

Chromium Picolinate

Glucomannan

Gymnema

Today's food consist of toxins that cause cancer. In order to prevent this a proper diet and stress manage plan is necessary. In addition the following supplements help with reduction of tumors and cyst and also with inflammation. 

Astaxanthin

Grapeseed Extract

MSM

Pycnogenol

Vitamin C