Making your own tinctures isn't as hard as you might think. Once you get a couple under your belt I bet you will be hooked like I am. It saves you a lot of money and you know exactly the quality of ingredients being used.
Alcohol or Oil based tinctures
Gather the useful parts of the herb(s), possibly the berries, leaves, roots, bark, or all of these, and remove any unwanted parts.
Wash and coarsely chop the herbs.
You can also used dried herbs .
Place them into an airtight jar.
Pour alcohol, vinegar or oil into the jar and seal it.
For fresh herbs, use a 1-1 ft-to-alcohol or oil ratio.
For dry herbs use 1 part herb 4 parts liquid/oil base
Some oil bases examples are, avocado, coconut, jojoba, hemp, almond, grapeseed, These are nice lighter oils if you're planning on making any skin care oils like rosehip. I always add some vitamin E to my mixture, as its a natural preservative. You may purchase some vit E oil capsules and break open aprox 4 for an 8 0z bottle. Make sure your hands are washed and your area your working with is always clean to prevent contamination.
If i had an 8oz bottle of herbal infused oil i would take 4-6 vitamin E capsules and break them open and add contents. Throw away the capsule after don't add to your mixture. I also make sure my hands and working area is clean and sterile so no contaminants get into my products to cause contamination. That being said micro spores are hardy and can make their way into your oils or tinctures. My oils have lasted months in a cool dark place/cupboard and some of my alcohol tinctures have lasted years.