Is 40 minutes of cycling a day enough to lose weight?

Could you elaborate on the effectiveness of cycling 40 minutes per day for weight loss? Does this duration and frequency alone suffice, or should it be combined with other forms of exercise or dietary changes? Are there any factors that could affect the outcome, such as individual fitness level, intensity of the cycling sessions, or the individual's overall lifestyle? Additionally, how long can one expect to see noticeable results, and are there any potential risks or drawbacks to this approach?