In the United States, hemp can be purchased without any qualms. Processing and purchasing are allowed post the Farm Bill passed in 2018. According to the bill, hemp products can be sold, and it is completely legal, provided the THC content is below 0.3%.
The point to consider is to ensure what is being purchased. Double-check to ensure what you are buying is hemp with THC content equal to or below 0.3%. – that is what distinguishes hemp from marijuana and is an important factor to always keep in mind when purchasing CBD products.