L-Lysine is an essential amino acid, which means your body cannot manufacture it. It must be obtained through the diet or by supplementation. Lysine is one of the most well known amino acids and is an essential component of all proteins.

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Lysine may help prevent and relieve cold sores (herpes)

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Quality is truly job one at Now Foods. GMP Certification is only one of the Quality Standards utilized by Now.

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Item#

Brand

Name

Size

Form

Retail

Price

9554

Source Naturals

Amino Night

120

Capsule

$20.50

$12.50

1485

Source Naturals

L Lysine 1,000mg

100

Tablet

$11.98

$6.10

85943

Now

L Lysine 1,000mg

100

Tablet

$11.99

$6.95

19010

Now

L Lysine 500mg

100

Capsule

$8.99

$5.25

287

Twinlab

L Lysine 500mg

100

Capsule

$12.95

$5.95

3797

Now

L Lysine 500mg

250

Capsule

$18.99

$11.95

19052

Now

L Lysine 500mg

250

Tablet

$15.99

$11.35

327

Life Extension

L Lysine 620mg

100

Capsule

$9.00

$6.75

1932

Now

L Lysine Powder

1

Pound

$21.99

$12.99

288

Life Extension

L Lysine Powder

300

Gram

$16.00

$12.00

14734

Source Naturals

L Proline / L Lysine 275mg/275mg

60

Tablet

$11.98

$6.11

3980

Now

Tri-Amino

120

Capsule

$21.99

$11.95