‘a’
- abscess root
- abuta
- acacia rigidula
- acai
- acerola
- acetyl-l-carnitine
- ackee
- aconite
- activated charcoal
- active hexose correlated compound (ahcc)
- adenosine
- adrafinil - [fast facts]
- adrenal extract
- adrue
- aegeline
- african wild potato
- agar
- agaricus mushroom
- agave
- agmatine
- agrimony
- ajuga nipponensis
- albizia julibrissin
- alchemilla
- alder buckthorn
- aletris
- alfalfa
- algal oil
- algin
- alkanna
- allspice
- aloe
- alpha hydroxy acids (ahas)
- alpha-alanine
- alpha-gpc
- alpha-ketoglutarate (akg)
- alpha-linolenic acid (ala)
- alpha-lipoic acid
- alpine ragwort
- alpinia
- amaranth
- ambrette
- american adder's tongue
- american chestnut
- american dogwood
- american elder
- american ginseng
- american hellebore
- american ivy
- american mistletoe
- american pawpaw
- american spikenard
- american white water lily
- andarine
- andiroba
- andrachne
- andrographis
- androstenediol
- androstenedione
- androstenetrione
- androsterone - [fast facts]
- angel's trumpet
- angelica archangelica
- angostura
- anhydrous crystalline maltose
- anise
- annatto
- antineoplastons
- antioxidants
- apoaequorin
- apple
- apple cider vinegar
- apple polyphenols
- apricot
- apricot kernel
- arabinoxylan
- arenaria rubra
- arimistane - [fast facts]
- aristolochia
- arnica
- arrach
- arrowroot
- arsenic
- artemisia herba-alba
- artichoke
- arum
- asafoetida
- asarabacca
- ascophyllum nodosum
- ascorbigen
- ash
- ashitaba
- ashwagandha
- asian water plantain
- asparagus
- asparagus racemosus
- aspartic acid
- aspen
- astaxanthin
- astragalus
- atlantic cedar
- atractylodes
- autumn crocus
- avens
- avocado
- avocado soy unsaponifiables (asu)
- avocado sugar extract
- ayahuasca