I'd recommend a full spectrum as you're getting all of the beneficial compounds from the plant, and they can work synergistically to enhance benefits. Isolate is only CBD, all the other compounds have been stripped away or filtered. Broad Spectrum still contains many of the beneficial effects of Full Spectrum but it still has some compounds (namely THC) stripped from it. You can find a lot of great info at ProjectCBD.org as well.
I am a former family doctor and naturopathic physician as well as a medical editor and author, working mostly in academic research. In my practice I have always focused on natural medicine and helped my patients of all ages who haven’t responded to traditional treatments. I also have written a significant number of articles in botanical medicine, addiction, drugs. As of now I'm focused on cannabis researches, especially on cannabidiol, its health benefits and how it can improve life of people with severe diseases. You can read my articles here on CBDreamers
Instead, CBD acts as an agonist on an entirely different receptor called the 5-HT1A receptor, and this is how CBD actually works as an antidepressant with anti-anxiety and neuroprotective effects. It also serves as what is called an “allosteric modulator” of your opioid receptors, which is how it works to remove pain and reduce the effects of chronic inflammation. Other positive medical effects of CBD (there’s over 60 of them, if you care to read up on them here) are due to increased intracellular calcium release and agonism of another receptor called the PPAR-γ receptor.
 S. Maione, F. Piscitelli, L. Gatta, D. Vita, L. De Petrocellis, E. Palazzo, V. de Novellis, and V. Di Marzo, “Non-psychoactive Cannabinoids Modulate the Descending Pathway of Antinociception in Anaesthetized Rats through Several Mechanisms of Action,” British Journal of Phramacology 162, no. 3 (2011): 584. doi:10.1111/j.1476-5381.2010.01063.x.
FDA DISCLOSURE Representations regarding the efficacy and safety of Rosebud CBD have not been evaluated by the Food and Drug Administration. The FDA only evaluates foods and drugs, not supplements like these products. These products are not intended to diagnose, prevent, treat, or cure any disease. Click here (https://www.ncbi.nlm.nih.gov/pubmed/22625422) and here (https://www.ncbi.nlm.nih.gov/pubmed/18728714) to find evidence of a test, analysis, research, or study describing the benefits, performance or efficacy of CBD Oil based on the expertise of relevant professionals. These statements have not been evaluated by the FDA and are not intended to diagnose, treat, or cure any disease. Always check with your physician before starting a new dietary supplement program. The Cannabidiol (CBD) in Rosebud CBD is a natural constituent of industrial hemp plant and grown in the United States of America. Rosebud CBD does not sell or distribute any products that are in violation of the United States Controlled Substances Act (US CSA). All products contain less than 0.3% THC. All products are legal in all 50 states.
Even if you live in a state where marijuana use is legal, the federal Drug Enforcement Administration still classifies the CBD extract as a Schedule 1 substance — the DEA's most restricted category. According to the agency, "Schedule I drugs, substances or chemicals are defined as drugs with no currently accepted medical use and a high potential for abuse."
This CBD oil not only made me feel like I never had anxiety in the first place but gave me energy to sprint through the day. Now, if you read my blog, you probably have figured out already that am not exactly the ‘cheeriest’ person on the planet. I have my reasons not to be. Yet somehow this product made me believe otherwise, even if it was for a short period.
Here is a statement from one of the studies concerning CBD and glaucoma and was presented as an opening statement in the Future Direction section of the study. It states, “Cannabinoids have the potential of becoming a useful potentially relievement for glaucoma, as they seem to have neuroprotective properties and effectively reduce intraocular pressure.”
A 2007 study with the pharmaceutical 1:1 CBD:THC spray showed good results in helping patients with chronic pain sleep better. REM sleep behavior disorder (RBD) is characterized by the loss of complete muscle relaxation during REM sleep, associated with nightmares and physical activity during dreaming. Four patients in a case series treated with CBD in 2014 had prompt and substantial reduction in the frequency of RBD-related events without side effects. 
In the United States, non-FDA approved CBD products are classified as Schedule I drugs under the Controlled Substances Act. This means that production, distribution, and possession of non-FDA approved CBD products is illegal under federal law. In addition, in 2016 the Drug Enforcement Administration added "marijuana extracts" to the list of Schedule I drugs, which it defined as "an extract containing one or more cannabinoids that has been derived from any plant of the genus Cannabis, other than the separated resin (whether crude or purified) obtained from the plant." Previously, CBD had simply been considered "marijuana", which is a Schedule I drug.