These seeds, used in Indian cooking, have been found to lower blood sugar, increase insulin sensitivity, and reduce high cholesterol, according to several animal and human studies. The effect may be partly due to the seeds’ high fiber content. The seeds also contain an amino acid that appears to boost the release of insulin. In one of the largest studies on fenugreek, 60 people who took 25 grams daily showed significant improvements in blood sugar control and post-meal spikes.
Ground cinnamon is very safe, the volatile oils can however cause a skin rash. Small amounts of coumarin can be found in Cassia and other cinnamons, generally only large doses of this compound will cause blood-thinning and liver problems, but it's something to be aware of. Also if you're planning on having surgery you should stop the use of cinnamon at least one week before going in as it has a blood thinning effect. You should also take care to monitor your blood sugar to avoid an unsafe drop in blood pressure.
In a survey of American cancer patients, baby boomers were more likely to support complementary and alternative treatments than people from an older generation.[20] White, female, college-educated patients who had been diagnosed more than a year ago were more likely than others to report a favorable impression of at least some complementary and alternative benefits.[20]
Since herbs are food and not medicine, you can take them any time you want. Of course you wouldn’t want to take an energizing herb like ginseng right at bedtime or sedative herbs first thing in the morning. You can decide for yourself if you prefer to take herbs with or without a meal. Do what works best for you. Some herbs work better on an empty stomach. You’ll have to read the label on the supplement bottle to see what is the recommended way of taking them.
​The next herb on our list is chamomile, this is another great herb with a wide array of uses. The Spanish name for this herb is manzanilla which simply means "little apple" it's no surprise that the Spanish people gave it this name. When the leaves and petals are bruised they give off a very distinct apple aroma. There are two main species chamomile German chamomile and Roman or English chamomile, they're all similar in there medicinal effects but the Roman or English species have a more pronounced aroma than the German variety. Both varieties are relatively easy to grow from seed, in fact if they are left to seed on there own you'll find that they have grown back the next spring.  
Ilex paraguariensis Yerba mate It has been claimed to have various effects on human health and these effects have been attributed to the high quantity of polyphenols found in mate tea.[97] Mate contains compounds that act as an appetite suppressant,[98] increases mental energy and focus,[99] and improves mood.[100] Yerba mate also contains elements such as potassium, magnesium, and manganese.[101]