Proline supplements with the fewest additives

Proline is an amino acid that's necessary for collagen synthesis, and may lower Lipoprotein(a). However, many proline supplements use excipients to make manufacturing easier and less expensive. I try to avoid such excipients when possible. If you want to do the same, my recommendations are:

No-additive L-proline gelatin capsule recommendations:

Photo of PureBulk L-Proline (Gelatin Capsules)
PureBulk L-Proline (Gelatin Capsules)
Available on PureBulk
Positives:
  • silica-free / silicon-dioxide-free
  • hypromellose-free / hydroxypropyl methylcellulose-free
Negatives:
(none)
All ingredients:

L-proline, gelatin capsule.

No-additive L-proline veggie capsule recommendations:

Photo of NutraBio L-Proline (Veggie Capsules)
NutraBio L-Proline (Veggie Capsules)
Available on nutrabio.com
Positives:
  • silica-free / silicon-dioxide-free
Negatives:
  • may contain hypromellose / hydroxypropyl methylcellulose
All ingredients:

L-proline, vegetable capsule (probably hydroxypropyl methylcellulose).

Photo of PureBulk L-Proline (Veggie Capsules)
PureBulk L-Proline (Veggie Capsules)
Available on PureBulk
Positives:
  • silica-free / silicon-dioxide-free
Negatives:
  • may contain hypromellose / hydroxypropyl methylcellulose
All ingredients:

L-proline, cellulose capsule (probably hydroxypropyl methylcellulose).

No-additive L-proline powder recommendations:

Photo of BulkSupplements L-Proline (Powder)
BulkSupplements L-Proline (Powder)
Available on Bulk Supplements
Positives:
  • silica-free / silicon-dioxide-free
  • hypromellose-free / hydroxypropyl methylcellulose-free
Negatives:
(none)
All ingredients:

L-proline powder.

Photo of NutraBio L-Proline (Powder)
NutraBio L-Proline (Powder)
Available on nutrabio.com
Positives:
  • silica-free / silicon-dioxide-free
  • hypromellose-free / hydroxypropyl methylcellulose-free
Negatives:
(none)
All ingredients:

L-proline powder.

Photo of PureBulk L-Proline (Powder)
PureBulk L-Proline (Powder)
Available on PureBulk
Positives:
  • silica-free / silicon-dioxide-free
  • hypromellose-free / hydroxypropyl methylcellulose-free
Negatives:
(none)
All ingredients:

L-proline powder.

In the UK?

The recommended NutraBio and BulkSupplements powders will ship internationally, or you can try Metabolics brand veggie caps if you don't mind methylcellulose:

Metabolics Proline (Veggie Capsules)
Available on metabolics.com
Positives:
  • silica-free / silicon-dioxide-free
Negatives:
  • may contain hypromellose / hydroxypropyl methylcellulose
All ingredients:

L-proline, methylcellulose capsule (probably hydroxypropyl methylcellulose).

Outside the US/UK?

The recommended NutraBio and BulkSupplements powders will ship internationally.

If you frequently need US-based products, Reship.com and MyUS.com can forward packages to you from the US.

If you find a better option in your country, please let me know in the comments.


Other proline products

The following are other proline products I'm aware of, sorted alphabetically.

Name Ingredients
Now Foods L-Proline (Powder)

L-proline powder.

Now Foods L-Proline (Veggie Capsules)

L-proline, cellulose (capsule), stearic acid (vegetable source) and silica.

Puritan's Pride L-Proline (Veggie Capsules)

L-proline (free form), vegetable cellulose, vegetable magnesium stearate.

Solgar L-Proline (Veggie Capsules)

L-proline, vegetable cellulose, vegetable magnesium stearate, water. May contain vegetable glycerin.

Source Naturals L-Proline (Powder)

L-proline powder.

Swanson L-Proline (Gelatin Capsules)

L-proline, cellulose, gelatin (capsule), vegetable stearate.


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