Our calculator combines your body weight with your primary wellness goal using a research-informed model. The calculator outputs a starting dose range — not a definitive prescription. CBD affects everyone differently depending on individual endocannabinoid system sensitivity and metabolism.

The UK Food Standards Agency (FSA) recommends that healthy adults consume no more than 10mg of CBD per day as a food supplement. This equals 2 drops of Valley CBD's 10% oil, 1 drop of the 20% oil, or half a drop of the 40% oil per day.

Start low, go slow is the universally recommended approach for CBD. Begin at the lower end of your calculated dose and increase by one drop every 3–5 days until you find the amount that works for you. This minimises side effects and helps identify your minimum effective dose.

The endocannabinoid system (ECS) is found in all humans and plays a key role in regulating mood, pain, sleep, and appetite. Because every person's ECS is unique in sensitivity and function, the optimal CBD dose varies significantly between individuals — this is why personalised dosing matters.

CBD exhibits a biphasic effect — at lower doses it tends to produce alertness and mild anxiety reduction; at higher doses it is more associated with sedation and sleep support. Finding your personal sweet spot is the key principle behind our calculator.

For daytime anxiety or stress, a lower dose in the morning works well. For sleep support, take CBD 30–60 minutes before bed. Many users split their dose — a small amount in the morning and the remainder in the evening.

Sublingual CBD oil typically produces effects within 15–45 minutes. For long-term benefits such as improved sleep or reduced chronic anxiety, give CBD 4–6 weeks of consistent daily use before fully assessing its impact.

In the UK, the Veterinary Medicines Directorate (VMD) states that products marketed with medicinal claims for animals require Marketing Authorisation. As CBD products are sold as food supplements they do not have this, so we cannot market or recommend them for animal use.

Veterinary research often discusses starting dosages between 0.2mg to 0.5mg of CBD per kilogram of body weight per day. This is purely informational. You must consult your veterinarian before giving your pet CBD.