A straightforward month's supply of one of the nine essential amino acids, from ethical Midlands brand Viridian Nutrition. Because the body cannot produce lysine, it has to come from food, and those on plant-based diets sometimes find their intake on the lower side, which makes this simple capsule a practical top-up alongside varied meals.

Every vegan capsule provides 500mg of L-lysine in its free form, ready for absorption without digestion, with no artificial fillers, binders or other additives. The 30 capsule bottle is made of amber glass to protect the contents, and the usual dose is one to three capsules daily with food. If you find it suits you, the 90 capsule size offers better value over time. Viridian has donated a share of its profits to charity since it was founded in 1999.